19993404672 has 108 divisors (see below), whose sum is σ = 60152418144. Its totient is φ = 6374691840.

The previous prime is 19993404667. The next prime is 19993404689. The reversal of 19993404672 is 27640439991.

19993404672 is a `hidden beast` number, since 1 + 99 + 93 + 4 + 0 + 467 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135654 + ... + 241637.

Almost surely, 2^19993404672 is an apocalyptic number.

19993404672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19993404672 is an abundant number, since it is smaller than the sum of its proper divisors (40159013472).

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

19993404672 is a wasteful number, since it uses less digits than its factorization.

19993404672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377336 (or 377319 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 19993404672 in words is "nineteen billion, nine hundred ninety-three million, four hundred four thousand, six hundred seventy-two".