21527576084 has 12 divisors (see below), whose sum is σ = 43055152224. Its totient is φ = 9226104024.

The previous prime is 21527576027. The next prime is 21527576101. The reversal of 21527576084 is 48067572512.

21527576084 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384420974 + ... + 384421029.

It is an arithmetic number, because the mean of its divisors is an integer number (3587929352).

Almost surely, 2^21527576084 is an apocalyptic number.

It is an amenable number.

21527576084 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21527576084 is a wasteful number, since it uses less digits than its factorization.

21527576084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768842014 (or 768842012 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 21527576084 in words is "twenty-one billion, five hundred twenty-seven million, five hundred seventy-six thousand, eighty-four".