21132042004 has 12 divisors (see below), whose sum is σ = 37533030304. Its totient is φ = 10408319064.

The previous prime is 21132041999. The next prime is 21132042023. The reversal of 21132042004 is 40024023112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39425184 + ... + 39425719.

Almost surely, 2^21132042004 is an apocalyptic number.

It is an amenable number.

21132042004 is a deficient number, since it is larger than the sum of its proper divisors (16400988300).

21132042004 is a wasteful number, since it uses less digits than its factorization.

21132042004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78850974 (or 78850972 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21132042004 its reverse (40024023112), we get a palindrome (61156065116).

The spelling of 21132042004 in words is "twenty-one billion, one hundred thirty-two million, forty-two thousand, four".