21170501160 has 64 divisors (see below), whose sum is σ = 63784169280. Its totient is φ = 5621230080.

The previous prime is 21170501153. The next prime is 21170501171. The reversal of 21170501160 is 6110507112.

It is a super-2 number, since 2×21170501160² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21170501160.

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, 350626 + ... + 406545.

It is an arithmetic number, because the mean of its divisors is an integer number (996627645).

Almost surely, 2^21170501160 is an apocalyptic number.

21170501160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21170501160 is an abundant number, since it is smaller than the sum of its proper divisors (42613668120).

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

21170501160 is a wasteful number, since it uses less digits than its factorization.

21170501160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757418 (or 757414 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 24.

The spelling of 21170501160 in words is "twenty-one billion, one hundred seventy million, five hundred one thousand, one hundred sixty".