18084157 has 32 divisors (see below), whose sum is σ = 23595264. Its totient is φ = 13478400.

The previous prime is 18084109. The next prime is 18084163. The reversal of 18084157 is 75148081.

It is not a de Polignac number, because 18084157 - 2¹⁹ = 17559869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18082157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137982 + ... + 138112.

It is an arithmetic number, because the mean of its divisors is an integer number (737352).

Almost surely, 2^18084157 is an apocalyptic number.

It is an amenable number.

18084157 is a deficient number, since it is larger than the sum of its proper divisors (5511107).

18084157 is a wasteful number, since it uses less digits than its factorization.

18084157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 18084157 is about 4252.5471190805. The cubic root of 18084157 is about 262.4819373815.

The spelling of 18084157 in words is "eighteen million, eighty-four thousand, one hundred fifty-seven".