21232512510 has 48 divisors (see below), whose sum is σ = 56011728528. Its totient is φ = 5147274880.

The previous prime is 21232512473. The next prime is 21232512527. The reversal of 21232512510 is 1521523212.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2920959 + ... + 2928218.

It is an arithmetic number, because the mean of its divisors is an integer number (1166911011).

Almost surely, 2^21232512510 is an apocalyptic number.

21232512510 is an abundant number, since it is smaller than the sum of its proper divisors (34779216018).

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

21232512510 is a wasteful number, since it uses less digits than its factorization.

21232512510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5849209 (or 5849198 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21232512510 in words is "twenty-one billion, two hundred thirty-two million, five hundred twelve thousand, five hundred ten".