21153232025264 has 20 divisors (see below), whose sum is σ = 43395233346504. Its totient is φ = 9954462129408.

The previous prime is 21153232025131. The next prime is 21153232025269. The reversal of 21153232025264 is 46252023235112.

It is a super-2 number, since 2×21153232025264² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21153232025269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38884617422 + ... + 38884617965.

Almost surely, 2^{21153232025264} is an apocalyptic number.

It is an amenable number.

21153232025264 is an abundant number, since it is smaller than the sum of its proper divisors (22242001321240).

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

21153232025264 is a wasteful number, since it uses less digits than its factorization.

21153232025264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77769235412 (or 77769235406 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 21153232025264 in words is "twenty-one trillion, one hundred fifty-three billion, two hundred thirty-two million, twenty-five thousand, two hundred sixty-four".