19442972 has 12 divisors (see below), whose sum is σ = 34064520. Its totient is φ = 9710256.

The previous prime is 19442959. The next prime is 19442977. The reversal of 19442972 is 27924491.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442977) 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 in 3 ways as a sum of consecutive naturals, for example, 2003 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (2838710).

Almost surely, 2^19442972 is an apocalyptic number.

It is an amenable number.

19442972 is a deficient number, since it is larger than the sum of its proper divisors (14621548).

19442972 is a wasteful number, since it uses less digits than its factorization.

19442972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620 (or 5618 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 19442972 is about 4409.4185557735. The cubic root of 19442972 is about 268.8979864974.

The spelling of 19442972 in words is "nineteen million, four hundred forty-two thousand, nine hundred seventy-two".