19807708944 has 20 divisors (see below), whose sum is σ = 51169914896. Its totient is φ = 6602569632.

The previous prime is 19807708873. The next prime is 19807709003. The reversal of 19807708944 is 44980770891.

It is a super-2 number, since 2×19807708944² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206330254 + ... + 206330349.

Almost surely, 2^19807708944 is an apocalyptic number.

It is an amenable number.

19807708944 is an abundant number, since it is smaller than the sum of its proper divisors (31362205952).

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

19807708944 is a wasteful number, since it uses less digits than its factorization.

19807708944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412660614 (or 412660608 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 19807708944 in words is "nineteen billion, eight hundred seven million, seven hundred eight thousand, nine hundred forty-four".