18026338 has 12 divisors (see below), whose sum is σ = 29721510. Its totient is φ = 8193680.

The previous prime is 18026321. The next prime is 18026357. The reversal of 18026338 is 83362081.

It can be written as a sum of positive squares in only one way, i.e., 14235529 + 3790809 = 3773^2 + 1947^2 .

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 5 ways as a sum of consecutive naturals, for example, 37003 + ... + 37486.

Almost surely, 2^18026338 is an apocalyptic number.

18026338 is a deficient number, since it is larger than the sum of its proper divisors (11695172).

18026338 is a wasteful number, since it uses less digits than its factorization.

18026338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74513 (or 74502 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18026338 is about 4245.7435155694. The cubic root of 18026338 is about 262.2019013613.

The spelling of 18026338 in words is "eighteen million, twenty-six thousand, three hundred thirty-eight".