19492972 has 6 divisors (see below), whose sum is σ = 34112708. Its totient is φ = 9746484.

The previous prime is 19492961. The next prime is 19492973. The reversal of 19492972 is 27929491.

It is not an unprimeable number, because it can be changed into a prime (19492973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2436618 + ... + 2436625.

Almost surely, 2^19492972 is an apocalyptic number.

It is an amenable number.

19492972 is a deficient number, since it is larger than the sum of its proper divisors (14619736).

19492972 is a wasteful number, since it uses less digits than its factorization.

19492972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873247 (or 4873245 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 19492972 is about 4415.0845971510. The cubic root of 19492972 is about 269.1282906349.

The spelling of 19492972 in words is "nineteen million, four hundred ninety-two thousand, nine hundred seventy-two".