21715700512 has 48 divisors (see below), whose sum is σ = 47776980384. Its totient is φ = 9630016000.

The previous prime is 21715700491. The next prime is 21715700537. The reversal of 21715700512 is 21500751712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737914 + ... + 766777.

It is an arithmetic number, because the mean of its divisors is an integer number (995353758).

Almost surely, 2^21715700512 is an apocalyptic number.

21715700512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21715700512 is an abundant number, since it is smaller than the sum of its proper divisors (26061279872).

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

21715700512 is a wasteful number, since it uses less digits than its factorization.

21715700512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504753 (or 1504745 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 31.

It can be divided in two parts, 21715 and 700512, that added together give a palindrome (722227).

The spelling of 21715700512 in words is "twenty-one billion, seven hundred fifteen million, seven hundred thousand, five hundred twelve".