18157154 has 4 divisors (see below), whose sum is σ = 27235734. Its totient is φ = 9078576.

The previous prime is 18157147. The next prime is 18157159. The reversal of 18157154 is 45175181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11256025 + 6901129 = 3355^2 + 2627^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18157154.

It is not an unprimeable number, because it can be changed into a prime (18157159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4539287 + ... + 4539290.

Almost surely, 2^18157154 is an apocalyptic number.

18157154 is a deficient number, since it is larger than the sum of its proper divisors (9078580).

18157154 is an equidigital number, since it uses as much as digits as its factorization.

18157154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9078579.

The product of its digits is 5600, while the sum is 32.

The square root of 18157154 is about 4261.1212139530. The cubic root of 18157154 is about 262.8346341503.

The spelling of 18157154 in words is "eighteen million, one hundred fifty-seven thousand, one hundred fifty-four".