21542852352 has 108 divisors (see below), whose sum is σ = 66696402696. Its totient is φ = 6155089920.

The previous prime is 21542852297. The next prime is 21542852399. The reversal of 21542852352 is 25325824512.

It is a self number, because there is not a number n which added to its sum of digits gives 21542852352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248599 + ... + 323862.

Almost surely, 2^21542852352 is an apocalyptic number.

It is an amenable number.

21542852352 is an abundant number, since it is smaller than the sum of its proper divisors (45153550344).

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

21542852352 is an equidigital number, since it uses as much as digits as its factorization.

21542852352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572494 (or 572473 counting only the distinct ones).

The product of its digits is 192000, while the sum is 39.

The spelling of 21542852352 in words is "twenty-one billion, five hundred forty-two million, eight hundred fifty-two thousand, three hundred fifty-two".