18147157 has 16 divisors (see below), whose sum is σ = 21196800. Its totient is φ = 15216768.

The previous prime is 18147149. The next prime is 18147167. The reversal of 18147157 is 75174181.

It is not a de Polignac number, because 18147157 - 2³ = 18147149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18147137) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 121719 + ... + 121867.

It is an arithmetic number, because the mean of its divisors is an integer number (1324800).

Almost surely, 2^18147157 is an apocalyptic number.

It is an amenable number.

18147157 is a deficient number, since it is larger than the sum of its proper divisors (3049643).

18147157 is a wasteful number, since it uses less digits than its factorization.

18147157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its digits is 7840, while the sum is 34.

The square root of 18147157 is about 4259.9480043775. The cubic root of 18147157 is about 262.7863879657.

The spelling of 18147157 in words is "eighteen million, one hundred forty-seven thousand, one hundred fifty-seven".