21716573116 has 24 divisors (see below), whose sum is σ = 43500312576. Its totient is φ = 9292710000.

The previous prime is 21716573111. The next prime is 21716573147. The reversal of 21716573116 is 61137561712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21716573111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581260 + ... + 617491.

It is an arithmetic number, because the mean of its divisors is an integer number (1812513024).

Almost surely, 2^21716573116 is an apocalyptic number.

It is an amenable number.

21716573116 is an abundant number, since it is smaller than the sum of its proper divisors (21783739460).

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

21716573116 is a wasteful number, since it uses less digits than its factorization.

21716573116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199409 (or 1199407 counting only the distinct ones).

The product of its digits is 52920, while the sum is 40.

The spelling of 21716573116 in words is "twenty-one billion, seven hundred sixteen million, five hundred seventy-three thousand, one hundred sixteen".