21365265352452 has 48 divisors (see below), whose sum is σ = 56974645123200. Its totient is φ = 6104296795392.

The previous prime is 21365265352439. The next prime is 21365265352511. The reversal of 21365265352452 is 25425356256312.

It is a junction number, because it is equal to n+sod(n) for n = 21365265352395 and 21365265352404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6919618 + ... + 9519014.

It is an arithmetic number, because the mean of its divisors is an integer number (1186971773400).

Almost surely, 2^{21365265352452} is an apocalyptic number.

It is an amenable number.

21365265352452 is an abundant number, since it is smaller than the sum of its proper divisors (35609379770748).

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

21365265352452 is a wasteful number, since it uses less digits than its factorization.

21365265352452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697260 (or 2697258 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 51.

The spelling of 21365265352452 in words is "twenty-one trillion, three hundred sixty-five billion, two hundred sixty-five million, three hundred fifty-two thousand, four hundred fifty-two".