21238925132 has 12 divisors (see below), whose sum is σ = 37209104520. Its totient is φ = 10607752416.

The previous prime is 21238925117. The next prime is 21238925203. The reversal of 21238925132 is 23152983212.

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 3 ways as a sum of consecutive naturals, for example, 2923457 + ... + 2930712.

It is an arithmetic number, because the mean of its divisors is an integer number (3100758710).

Almost surely, 2^21238925132 is an apocalyptic number.

It is an amenable number.

21238925132 is a deficient number, since it is larger than the sum of its proper divisors (15970179388).

21238925132 is a wasteful number, since it uses less digits than its factorization.

21238925132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855080 (or 5855078 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The spelling of 21238925132 in words is "twenty-one billion, two hundred thirty-eight million, nine hundred twenty-five thousand, one hundred thirty-two".