21293773170 has 32 divisors (see below), whose sum is σ = 51867822528. Its totient is φ = 5593587648.

The previous prime is 21293773169. The next prime is 21293773187. The reversal of 21293773170 is 7137739212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5294949 + ... + 5298968.

It is an arithmetic number, because the mean of its divisors is an integer number (1620869454).

Almost surely, 2^21293773170 is an apocalyptic number.

21293773170 is an abundant number, since it is smaller than the sum of its proper divisors (30574049358).

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

21293773170 is a wasteful number, since it uses less digits than its factorization.

21293773170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593994.

The product of its (nonzero) digits is 111132, while the sum is 42.

The spelling of 21293773170 in words is "twenty-one billion, two hundred ninety-three million, seven hundred seventy-three thousand, one hundred seventy".