19972525 has 12 divisors (see below), whose sum is σ = 25565824. Its totient is φ = 15462000.

The previous prime is 19972523. The next prime is 19972529. The reversal of 19972525 is 52527991.

It is not a de Polignac number, because 19972525 - 2¹ = 19972523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12111 + ... + 13660.

Almost surely, 2^19972525 is an apocalyptic number.

It is an amenable number.

19972525 is a deficient number, since it is larger than the sum of its proper divisors (5593299).

19972525 is a wasteful number, since it uses less digits than its factorization.

19972525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25812 (or 25807 counting only the distinct ones).

The product of its digits is 56700, while the sum is 40.

The square root of 19972525 is about 4469.0631009195. The cubic root of 19972525 is about 271.3174069913.

The spelling of 19972525 in words is "nineteen million, nine hundred seventy-two thousand, five hundred twenty-five".