21103524004 has 24 divisors (see below), whose sum is σ = 37798302080. Its totient is φ = 10304116704.

The previous prime is 21103523999. The next prime is 21103524041. The reversal of 21103524004 is 40042530112.

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, 993802 + ... + 1014814.

Almost surely, 2^21103524004 is an apocalyptic number.

It is an amenable number.

21103524004 is a deficient number, since it is larger than the sum of its proper divisors (16694778076).

21103524004 is a wasteful number, since it uses less digits than its factorization.

21103524004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26899 (or 26897 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The spelling of 21103524004 in words is "twenty-one billion, one hundred three million, five hundred twenty-four thousand, four".