19942975 has 12 divisors (see below), whose sum is σ = 26631976. Its totient is φ = 14726880.

The previous prime is 19942969. The next prime is 19942987. The reversal of 19942975 is 57924991.

It is a happy number.

It is not a de Polignac number, because 19942975 - 2⁷ = 19942847 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 30357 + ... + 31006.

Almost surely, 2^19942975 is an apocalyptic number.

19942975 is a deficient number, since it is larger than the sum of its proper divisors (6689001).

19942975 is a wasteful number, since it uses less digits than its factorization.

19942975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61386 (or 61381 counting only the distinct ones).

The product of its digits is 204120, while the sum is 46.

The square root of 19942975 is about 4465.7558150889. The cubic root of 19942975 is about 271.1835333049.

The spelling of 19942975 in words is "nineteen million, nine hundred forty-two thousand, nine hundred seventy-five".