19894681924 has 24 divisors (see below), whose sum is σ = 37682254400. Its totient is φ = 9136014624.

The previous prime is 19894681913. The next prime is 19894681951. The reversal of 19894681924 is 42918649891.

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, 950934 + ... + 971629.

Almost surely, 2^19894681924 is an apocalyptic number.

It is an amenable number.

19894681924 is a deficient number, since it is larger than the sum of its proper divisors (17787572476).

19894681924 is a wasteful number, since it uses less digits than its factorization.

19894681924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922779 (or 1922777 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 61.

The spelling of 19894681924 in words is "nineteen billion, eight hundred ninety-four million, six hundred eighty-one thousand, nine hundred twenty-four".