21365623325052 has 18 divisors (see below), whose sum is σ = 54007547849528. Its totient is φ = 7121874441672.

The previous prime is 21365623325023. The next prime is 21365623325069. The reversal of 21365623325052 is 25052332656312.

21365623325052 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 562 + 3 + 32 + 5 + 0 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 21365623324989 and 21365623325007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 296744768368 + ... + 296744768439.

Almost surely, 2^{21365623325052} is an apocalyptic number.

It is an amenable number.

21365623325052 is an abundant number, since it is smaller than the sum of its proper divisors (32641924524476).

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

21365623325052 is a wasteful number, since it uses less digits than its factorization.

21365623325052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593489536817 (or 593489536812 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 45.

The spelling of 21365623325052 in words is "twenty-one trillion, three hundred sixty-five billion, six hundred twenty-three million, three hundred twenty-five thousand, fifty-two".