21315055013352 has 64 divisors (see below), whose sum is σ = 59235242328000. Its totient is φ = 7101807596352.

The previous prime is 21315055013339. The next prime is 21315055013353. The reversal of 21315055013352 is 25331055051312.

21315055013352 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 50 + 550 + 1 + 3 + 3 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21315055013353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21817702 + ... + 22773717.

It is an arithmetic number, because the mean of its divisors is an integer number (925550661375).

Almost surely, 2^{21315055013352} is an apocalyptic number.

It is an amenable number.

21315055013352 is an abundant number, since it is smaller than the sum of its proper divisors (37920187314648).

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

21315055013352 is a wasteful number, since it uses less digits than its factorization.

21315055013352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44593647 (or 44593637 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The spelling of 21315055013352 in words is "twenty-one trillion, three hundred fifteen billion, fifty-five million, thirteen thousand, three hundred fifty-two".