19957025 has 24 divisors (see below), whose sum is σ = 27879168. Its totient is φ = 14040000.

The previous prime is 19957009. The next prime is 19957033. The reversal of 19957025 is 52075991.

It is not a de Polignac number, because 19957025 - 2⁴ = 19957009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19957025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7355 + ... + 9695.

It is an arithmetic number, because the mean of its divisors is an integer number (1161632).

Almost surely, 2^19957025 is an apocalyptic number.

It is an amenable number.

19957025 is a deficient number, since it is larger than the sum of its proper divisors (7922143).

19957025 is a wasteful number, since it uses less digits than its factorization.

19957025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 19957025 is about 4467.3286201040. The cubic root of 19957025 is about 271.2472020778.

The spelling of 19957025 in words is "nineteen million, nine hundred fifty-seven thousand, twenty-five".