18157025 has 12 divisors (see below), whose sum is σ = 22569984. Its totient is φ = 14490000.

The previous prime is 18157019. The next prime is 18157031. The reversal of 18157025 is 52075181.

It is an interprime number because it is at equal distance from previous prime (18157019) and next prime (18157031).

It is not a de Polignac number, because 18157025 - 2⁶ = 18156961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 15200 + ... + 16350.

It is an arithmetic number, because the mean of its divisors is an integer number (1880832).

Almost surely, 2^18157025 is an apocalyptic number.

It is an amenable number.

18157025 is a deficient number, since it is larger than the sum of its proper divisors (4412959).

18157025 is a wasteful number, since it uses less digits than its factorization.

18157025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792 (or 1787 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 18157025 is about 4261.1060770650. The cubic root of 18157025 is about 262.8340117006.

The spelling of 18157025 in words is "eighteen million, one hundred fifty-seven thousand, twenty-five".