21683080740 has 48 divisors (see below), whose sum is σ = 61707925440. Its totient is φ = 5687364480.

The previous prime is 21683080739. The next prime is 21683080751. The reversal of 21683080740 is 4708038612.

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, 2958510 + ... + 2965829.

It is an arithmetic number, because the mean of its divisors is an integer number (1285581780).

Almost surely, 2^21683080740 is an apocalyptic number.

21683080740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21683080740 is an abundant number, since it is smaller than the sum of its proper divisors (40024844700).

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

21683080740 is a wasteful number, since it uses less digits than its factorization.

21683080740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924412 (or 5924410 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 21683080740 in words is "twenty-one billion, six hundred eighty-three million, eighty thousand, seven hundred forty".