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20001421332 = 223217474671489
BaseRepresentation
bin10010101000001011…
…010111100000010100
31220121221012110221200
4102220023113200110
5311430330440312
613104415512500
71305440163504
oct225013274024
956557173850
1020001421332
11853430a982
123a62528730
131b69a84869
14d7a575a04
157c0e4c0dc
hex4a82d7814

20001421332 has 144 divisors (see below), whose sum is σ = 54826087680. Its totient is φ = 6124179456.

The previous prime is 20001421331. The next prime is 20001421337. The reversal of 20001421332 is 23312410002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001421331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13432044 + ... + 13433532.

It is an arithmetic number, because the mean of its divisors is an integer number (380736720).

Almost surely, 220001421332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001421332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27413043840).

20001421332 is an abundant number, since it is smaller than the sum of its proper divisors (34824666348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001421332 is a wasteful number, since it uses less digits than its factorization.

20001421332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20001421332 its reverse (23312410002), we get a palindrome (43313831334).

The spelling of 20001421332 in words is "twenty billion, one million, four hundred twenty-one thousand, three hundred thirty-two".

Divisors: 1 2 3 4 6 9 12 17 18 34 36 47 51 68 94 102 141 153 188 204 282 306 423 467 564 612 799 846 934 1401 1489 1598 1692 1868 2397 2802 2978 3196 4203 4467 4794 5604 5956 7191 7939 8406 8934 9588 13401 14382 15878 16812 17868 21949 23817 25313 26802 28764 31756 43898 47634 50626 53604 65847 69983 71451 75939 87796 95268 101252 131694 139966 142902 151878 197541 209949 227817 263388 279932 285804 303756 373133 395082 419898 455634 629847 695363 746266 790164 839796 911268 1119399 1189711 1259694 1390726 1492532 2086089 2238798 2379422 2519388 2781452 3358197 3569133 4172178 4477596 4758844 6258267 6716394 7138266 8344356 10707399 11821171 12516534 13432788 14276532 21414798 23642342 25033068 32682061 35463513 42829596 47284684 65364122 70927026 98046183 106390539 130728244 141854052 196092366 212781078 294138549 392184732 425562156 555595037 588277098 1111190074 1176554196 1666785111 2222380148 3333570222 5000355333 6667140444 10000710666 20001421332