21232501424 has 20 divisors (see below), whose sum is σ = 43557852744. Its totient is φ = 9991765248.

The previous prime is 21232501379. The next prime is 21232501427. The reversal of 21232501424 is 42410523212.

It is a junction number, because it is equal to n+sod(n) for n = 21232501393 and 21232501402.

It is not an unprimeable number, because it can be changed into a prime (21232501427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39030062 + ... + 39030605.

Almost surely, 2^21232501424 is an apocalyptic number.

It is an amenable number.

21232501424 is an abundant number, since it is smaller than the sum of its proper divisors (22325351320).

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

21232501424 is a wasteful number, since it uses less digits than its factorization.

21232501424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78060692 (or 78060686 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The spelling of 21232501424 in words is "twenty-one billion, two hundred thirty-two million, five hundred one thousand, four hundred twenty-four".