19956680 has 32 divisors (see below), whose sum is σ = 45541440. Its totient is φ = 7869120.

The previous prime is 19956679. The next prime is 19956697. The reversal of 19956680 is 8665991.

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, 674 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (1423170).

Almost surely, 2^19956680 is an apocalyptic number.

19956680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19956680 is an abundant number, since it is smaller than the sum of its proper divisors (25584760).

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

19956680 is a wasteful number, since it uses less digits than its factorization.

19956680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7109 (or 7105 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 19956680 is about 4467.2900062566. The cubic root of 19956680 is about 271.2456390388.

The spelling of 19956680 in words is "nineteen million, nine hundred fifty-six thousand, six hundred eighty".