21534253032 has 32 divisors (see below), whose sum is σ = 53841211200. Its totient is φ = 7177340544.

The previous prime is 21534253009. The next prime is 21534253063. The reversal of 21534253032 is 23035243512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221469 + ... + 303507.

It is an arithmetic number, because the mean of its divisors is an integer number (1682537850).

Almost surely, 2^21534253032 is an apocalyptic number.

It is an amenable number.

21534253032 is an abundant number, since it is smaller than the sum of its proper divisors (32306958168).

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

21534253032 is a wasteful number, since it uses less digits than its factorization.

21534253032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92985 (or 92981 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 21534253032 its reverse (23035243512), we get a palindrome (44569496544).

The spelling of 21534253032 in words is "twenty-one billion, five hundred thirty-four million, two hundred fifty-three thousand, thirty-two".