21624847116 has 24 divisors (see below), whose sum is σ = 50947862784. Its totient is φ = 7138298640.

The previous prime is 21624847067. The next prime is 21624847117. The reversal of 21624847116 is 61174842612.

It is not an unprimeable number, because it can be changed into a prime (21624847117) 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, 8746680 + ... + 8749151.

It is an arithmetic number, because the mean of its divisors is an integer number (2122827616).

Almost surely, 2^21624847116 is an apocalyptic number.

It is an amenable number.

21624847116 is an abundant number, since it is smaller than the sum of its proper divisors (29323015668).

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

21624847116 is a wasteful number, since it uses less digits than its factorization.

21624847116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17495941 (or 17495939 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The spelling of 21624847116 in words is "twenty-one billion, six hundred twenty-four million, eight hundred forty-seven thousand, one hundred sixteen".