19972976 has 20 divisors (see below), whose sum is σ = 39043632. Its totient is φ = 9897216.

The previous prime is 19972963. The next prime is 19972987. The reversal of 19972976 is 67927991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3716 + ... + 7331.

Almost surely, 2^19972976 is an apocalyptic number.

19972976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19972976 is a deficient number, since it is larger than the sum of its proper divisors (19070656).

19972976 is a wasteful number, since it uses less digits than its factorization.

19972976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11168 (or 11162 counting only the distinct ones).

The product of its digits is 428652, while the sum is 50.

The square root of 19972976 is about 4469.1135586378. The cubic root of 19972976 is about 271.3194491839.

The spelling of 19972976 in words is "nineteen million, nine hundred seventy-two thousand, nine hundred seventy-six".