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20012300231 = 71121031911201
BaseRepresentation
bin10010101000110100…
…110111011111000111
31220122200200011222212
4102220310313133013
5311441122101411
613105445014035
71305631513430
oct225064673707
956580604885
1020012300231
11853a470400
123a660b431b
131b6c0c3491
14d7bba8487
157c1d9a68b
hex4a8d377c7

20012300231 has 48 divisors (see below), whose sum is σ = 25537634304. Its totient is φ = 15348960000.

The previous prime is 20012300213. The next prime is 20012300239. The reversal of 20012300231 is 13200321002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2k-20012300231 is a prime.

It is a super-2 number, since 2×200123002312 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012300239) 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, 16662431 + ... + 16663631.

It is an arithmetic number, because the mean of its divisors is an integer number (532034048).

Almost surely, 220012300231 is an apocalyptic number.

20012300231 is a deficient number, since it is larger than the sum of its proper divisors (5525334073).

20012300231 is a wasteful number, since it uses less digits than its factorization.

20012300231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20012300231 its reverse (13200321002), we get a palindrome (33212621233).

The spelling of 20012300231 in words is "twenty billion, twelve million, three hundred thousand, two hundred thirty-one".

Divisors: 1 7 11 77 103 121 191 721 847 1133 1201 1337 2101 7931 8407 12463 13211 14707 19673 23111 87241 92477 123703 137711 145321 161777 216403 229391 865921 1017247 1360733 1514821 1605737 2380433 2523301 9525131 14968063 16663031 17663107 23627273 27756311 104776441 165390911 194294177 259900003 1819300021 2858900033 20012300231