21352315332 has 24 divisors (see below), whose sum is σ = 49933044000. Its totient is φ = 7101584896.

The previous prime is 21352315331. The next prime is 21352315337. The reversal of 21352315332 is 23351325312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21352315332.

It is not an unprimeable number, because it can be changed into a prime (21352315331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976082 + ... + 1986857.

It is an arithmetic number, because the mean of its divisors is an integer number (2080543500).

Almost surely, 2^21352315332 is an apocalyptic number.

It is an amenable number.

21352315332 is an abundant number, since it is smaller than the sum of its proper divisors (28580728668).

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

21352315332 is a wasteful number, since it uses less digits than its factorization.

21352315332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963395 (or 3963393 counting only the distinct ones).

The product of its digits is 16200, while the sum is 30.

The spelling of 21352315332 in words is "twenty-one billion, three hundred fifty-two million, three hundred fifteen thousand, three hundred thirty-two".