21524234232 has 32 divisors (see below), whose sum is σ = 53835616080. Its totient is φ = 7171407360.

The previous prime is 21524234213. The next prime is 21524234267. The reversal of 21524234232 is 23243242512.

It is a self number, because there is not a number n which added to its sum of digits gives 21524234232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155643 + ... + 259370.

Almost surely, 2^21524234232 is an apocalyptic number.

It is an amenable number.

21524234232 is an abundant number, since it is smaller than the sum of its proper divisors (32311381848).

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

21524234232 is a wasteful number, since it uses less digits than its factorization.

21524234232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417183 (or 417179 counting only the distinct ones).

The product of its digits is 23040, while the sum is 30.

Adding to 21524234232 its reverse (23243242512), we get a palindrome (44767476744).

The spelling of 21524234232 in words is "twenty-one billion, five hundred twenty-four million, two hundred thirty-four thousand, two hundred thirty-two".