19972056 has 32 divisors (see below), whose sum is σ = 53771760. Its totient is φ = 6145152.

The previous prime is 19972037. The next prime is 19972063. The reversal of 19972056 is 65027991.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31695 + ... + 32318.

Almost surely, 2^19972056 is an apocalyptic number.

It is an amenable number.

19972056 is an abundant number, since it is smaller than the sum of its proper divisors (33799704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19972056 is a wasteful number, since it uses less digits than its factorization.

19972056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64035 (or 64031 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 19972056 is about 4469.0106287634. The cubic root of 19972056 is about 271.3152832595.

The spelling of 19972056 in words is "nineteen million, nine hundred seventy-two thousand, fifty-six".