18215074 has 16 divisors (see below), whose sum is σ = 28366200. Its totient is φ = 8761984.

The previous prime is 18215059. The next prime is 18215081. The reversal of 18215074 is 47051281.

It can be written as a sum of positive squares in 4 ways, for example, as 13741849 + 4473225 = 3707^2 + 2115^2 .

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 7 ways as a sum of consecutive naturals, for example, 29214 + ... + 29830.

Almost surely, 2^18215074 is an apocalyptic number.

18215074 is a deficient number, since it is larger than the sum of its proper divisors (10151126).

18215074 is a wasteful number, since it uses less digits than its factorization.

18215074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18215074 is about 4267.9121359278. The cubic root of 18215074 is about 263.1138119605.

The spelling of 18215074 in words is "eighteen million, two hundred fifteen thousand, seventy-four".