19965257766252 has 72 divisors (see below), whose sum is σ = 51329011668480. Its totient is φ = 6541536862560.

The previous prime is 19965257766241. The next prime is 19965257766253. The reversal of 19965257766252 is 25266775256991.

19965257766252 is a `hidden beast` number, since 1 + 9 + 9 + 6 + 525 + 7 + 76 + 6 + 25 + 2 = 666.

It is a super-2 number, since 2×19965257766252² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19965257766253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18119977 + ... + 19190207.

It is an arithmetic number, because the mean of its divisors is an integer number (712902939840).

Almost surely, 2^{19965257766252} is an apocalyptic number.

19965257766252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19965257766252 is an abundant number, since it is smaller than the sum of its proper divisors (31363753902228).

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

19965257766252 is a wasteful number, since it uses less digits than its factorization.

19965257766252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079083 (or 1079078 counting only the distinct ones).

The product of its digits is 857304000, while the sum is 72.

The spelling of 19965257766252 in words is "nineteen trillion, nine hundred sixty-five billion, two hundred fifty-seven million, seven hundred sixty-six thousand, two hundred fifty-two".