19972975 has 24 divisors (see below), whose sum is σ = 27498240. Its totient is φ = 14268000.

The previous prime is 19972963. The next prime is 19972987. The reversal of 19972975 is 57927991.

It is an interprime number because it is at equal distance from previous prime (19972963) and next prime (19972987).

It is not a de Polignac number, because 19972975 - 2¹⁷ = 19841903 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 15610 + ... + 16840.

It is an arithmetic number, because the mean of its divisors is an integer number (1145760).

Almost surely, 2^19972975 is an apocalyptic number.

19972975 is a deficient number, since it is larger than the sum of its proper divisors (7525265).

19972975 is a wasteful number, since it uses less digits than its factorization.

19972975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1306 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 19972975 is about 4469.1134467588. The cubic root of 19972975 is about 271.3194446558.

The spelling of 19972975 in words is "nineteen million, nine hundred seventy-two thousand, nine hundred seventy-five".