18959725 has 24 divisors (see below), whose sum is σ = 24502400. Its totient is φ = 14541120.

The previous prime is 18959713. The next prime is 18959729. The reversal of 18959725 is 52795981.

It is not a de Polignac number, because 18959725 - 2¹⁹ = 18435437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18959729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95176 + ... + 95374.

Almost surely, 2^18959725 is an apocalyptic number.

It is an amenable number.

18959725 is a deficient number, since it is larger than the sum of its proper divisors (5542675).

18959725 is a wasteful number, since it uses less digits than its factorization.

18959725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 344 counting only the distinct ones).

The product of its digits is 226800, while the sum is 46.

The square root of 18959725 is about 4354.2766333801. The cubic root of 18959725 is about 266.6514878513.

The spelling of 18959725 in words is "eighteen million, nine hundred fifty-nine thousand, seven hundred twenty-five".