21060015204 has 24 divisors (see below), whose sum is σ = 49599291168. Its totient is φ = 6954397120.

The previous prime is 21060015173. The next prime is 21060015233. The reversal of 21060015204 is 40251006012.

It is a super-2 number, since 2×21060015204² (a number of 21 digits) contains 22 as substring.

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, 8199657 + ... + 8202224.

It is an arithmetic number, because the mean of its divisors is an integer number (2066637132).

Almost surely, 2^21060015204 is an apocalyptic number.

It is an amenable number.

21060015204 is an abundant number, since it is smaller than the sum of its proper divisors (28539275964).

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

21060015204 is a wasteful number, since it uses less digits than its factorization.

21060015204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16401995 (or 16401993 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 21060015204 in words is "twenty-one billion, sixty million, fifteen thousand, two hundred four".