21304722170 has 64 divisors (see below), whose sum is σ = 40151220480. Its totient is φ = 8131468800.

The previous prime is 21304722161. The next prime is 21304722191. The reversal of 21304722170 is 7122740312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7799705 + ... + 7802435.

It is an arithmetic number, because the mean of its divisors is an integer number (627362820).

Almost surely, 2^21304722170 is an apocalyptic number.

21304722170 is a deficient number, since it is larger than the sum of its proper divisors (18846498310).

21304722170 is a wasteful number, since it uses less digits than its factorization.

21304722170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191.

The product of its (nonzero) digits is 4704, while the sum is 29.

The spelling of 21304722170 in words is "twenty-one billion, three hundred four million, seven hundred twenty-two thousand, one hundred seventy".