19893992 has 16 divisors (see below), whose sum is σ = 37721700. Its totient is φ = 9834880.

The previous prime is 19893977. The next prime is 19893997. The reversal of 19893992 is 29939891.

It can be written as a sum of positive squares in 2 ways, for example, as 19307236 + 586756 = 4394^2 + 766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19893992.

It is not an unprimeable number, because it can be changed into a prime (19893997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13259 + ... + 14682.

Almost surely, 2^19893992 is an apocalyptic number.

It is an amenable number.

19893992 is a deficient number, since it is larger than the sum of its proper divisors (17827708).

19893992 is a wasteful number, since it uses less digits than its factorization.

19893992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28036 (or 28032 counting only the distinct ones).

The product of its digits is 314928, while the sum is 50.

The square root of 19893992 is about 4460.2681533737. The cubic root of 19893992 is about 270.9613285233.

The spelling of 19893992 in words is "nineteen million, eight hundred ninety-three thousand, nine hundred ninety-two".