19820972 has 12 divisors (see below), whose sum is σ = 34746096. Its totient is φ = 9893520.

The previous prime is 19820951. The next prime is 19820989. The reversal of 19820972 is 27902891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403 + ... + 6450.

It is an arithmetic number, because the mean of its divisors is an integer number (2895508).

Almost surely, 2^19820972 is an apocalyptic number.

It is an amenable number.

19820972 is a deficient number, since it is larger than the sum of its proper divisors (14925124).

19820972 is a wasteful number, since it uses less digits than its factorization.

19820972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8488 (or 8486 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 19820972 is about 4452.0750218297. The cubic root of 19820972 is about 270.6294049778.

The spelling of 19820972 in words is "nineteen million, eight hundred twenty thousand, nine hundred seventy-two".