21534125232 has 80 divisors (see below), whose sum is σ = 55964418048. Its totient is φ = 7134973440.

The previous prime is 21534125191. The next prime is 21534125243. The reversal of 21534125232 is 23252143512.

It is a self number, because there is not a number n which added to its sum of digits gives 21534125232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10199857 + ... + 10201967.

Almost surely, 2^21534125232 is an apocalyptic number.

It is an amenable number.

21534125232 is an abundant number, since it is smaller than the sum of its proper divisors (34430292816).

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

21534125232 is a wasteful number, since it uses less digits than its factorization.

21534125232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298 (or 3292 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

Adding to 21534125232 its reverse (23252143512), we get a palindrome (44786268744).

The spelling of 21534125232 in words is "twenty-one billion, five hundred thirty-four million, one hundred twenty-five thousand, two hundred thirty-two".