21952015080 has 64 divisors (see below), whose sum is σ = 66495461760. Its totient is φ = 5797033728.

The previous prime is 21952015061. The next prime is 21952015087. The reversal of 21952015080 is 8051025912.

It is not an unprimeable number, because it can be changed into a prime (21952015087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 875667 + ... + 900386.

It is an arithmetic number, because the mean of its divisors is an integer number (1038991590).

Almost surely, 2^21952015080 is an apocalyptic number.

21952015080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21952015080 is an abundant number, since it is smaller than the sum of its proper divisors (44543446680).

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

21952015080 is a wasteful number, since it uses less digits than its factorization.

21952015080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776170 (or 1776166 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 21952015080 in words is "twenty-one billion, nine hundred fifty-two million, fifteen thousand, eighty".