21315150204 has 24 divisors (see below), whose sum is σ = 49987819728. Its totient is φ = 7068983040.

The previous prime is 21315150179. The next prime is 21315150223. The reversal of 21315150204 is 40205151312.

It is a happy number.

It is a congruent number.

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, 4505917 + ... + 4510644.

It is an arithmetic number, because the mean of its divisors is an integer number (2082825822).

Almost surely, 2^21315150204 is an apocalyptic number.

It is an amenable number.

21315150204 is an abundant number, since it is smaller than the sum of its proper divisors (28672669524).

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

21315150204 is a wasteful number, since it uses less digits than its factorization.

21315150204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016765 (or 9016763 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21315150204 in words is "twenty-one billion, three hundred fifteen million, one hundred fifty thousand, two hundred four".