21103099204 has 24 divisors (see below), whose sum is σ = 41676969600. Its totient is φ = 9261547680.

The previous prime is 21103099177. The next prime is 21103099253. The reversal of 21103099204 is 40299030112.

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, 8267964 + ... + 8270515.

It is an arithmetic number, because the mean of its divisors is an integer number (1736540400).

Almost surely, 2^21103099204 is an apocalyptic number.

It is an amenable number.

21103099204 is a deficient number, since it is larger than the sum of its proper divisors (20573870396).

21103099204 is a wasteful number, since it uses less digits than its factorization.

21103099204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16538523 (or 16538521 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21103099204 in words is "twenty-one billion, one hundred three million, ninety-nine thousand, two hundred four".