18149156 has 12 divisors (see below), whose sum is σ = 32042892. Its totient is φ = 8994048.

The previous prime is 18149119. The next prime is 18149171. The reversal of 18149156 is 65194181.

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 14212900 = 1984^2 + 3770^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19625 + ... + 20528.

It is an arithmetic number, because the mean of its divisors is an integer number (2670241).

Almost surely, 2^18149156 is an apocalyptic number.

It is an amenable number.

18149156 is a deficient number, since it is larger than the sum of its proper divisors (13893736).

18149156 is a wasteful number, since it uses less digits than its factorization.

18149156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40270 (or 40268 counting only the distinct ones).

The product of its digits is 8640, while the sum is 35.

The square root of 18149156 is about 4260.1826251934. The cubic root of 18149156 is about 262.7960366892.

The spelling of 18149156 in words is "eighteen million, one hundred forty-nine thousand, one hundred fifty-six".