21714588840 has 64 divisors (see below), whose sum is σ = 74450021760. Its totient is φ = 4963334400.

The previous prime is 21714588821. The next prime is 21714588859. The reversal of 21714588840 is 4888541712.

It is an interprime number because it is at equal distance from previous prime (21714588821) and next prime (21714588859).

It is a self number, because there is not a number n which added to its sum of digits gives 21714588840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12924511 + ... + 12926190.

It is an arithmetic number, because the mean of its divisors is an integer number (1163281590).

Almost surely, 2^21714588840 is an apocalyptic number.

21714588840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21714588840 is an abundant number, since it is smaller than the sum of its proper divisors (52735432920).

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

21714588840 is a wasteful number, since it uses less digits than its factorization.

21714588840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25850722 (or 25850718 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The spelling of 21714588840 in words is "twenty-one billion, seven hundred fourteen million, five hundred eighty-eight thousand, eight hundred forty".