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22012123020 = 2235577635821
BaseRepresentation
bin10100100000000001…
…100101011110001100
32002211001200201010120
4110200001211132030
5330040100414040
614040124104540
71406323646526
oct244001453614
962731621116
1022012123020
1193762a6908
124323995150
1320ca507c84
1410cb618a16
1588c7257d0
hex52006578c

22012123020 has 48 divisors (see below), whose sum is σ = 61740859488. Its totient is φ = 5859717120.

The previous prime is 22012123019. The next prime is 22012123033. The reversal of 22012123020 is 2032121022.

It is a happy number.

It is a super-2 number, since 2×220121230202 (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283291 + ... + 352530.

It is an arithmetic number, because the mean of its divisors is an integer number (1286267906).

Almost surely, 222012123020 is an apocalyptic number.

22012123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012123020 is an abundant number, since it is smaller than the sum of its proper divisors (39728736468).

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

22012123020 is a wasteful number, since it uses less digits than its factorization.

22012123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636410 (or 636408 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22012123020 its reverse (2032121022), we get a palindrome (24044244042).

The spelling of 22012123020 in words is "twenty-two billion, twelve million, one hundred twenty-three thousand, twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 577 1154 1731 2308 2885 3462 5770 6924 8655 11540 17310 34620 635821 1271642 1907463 2543284 3179105 3814926 6358210 7629852 9537315 12716420 19074630 38149260 366868717 733737434 1100606151 1467474868 1834343585 2201212302 3668687170 4402424604 5503030755 7337374340 11006061510 22012123020