18118434 has 16 divisors (see below), whose sum is σ = 37812672. Its totient is φ = 5776848.

The previous prime is 18118367. The next prime is 18118469. The reversal of 18118434 is 43481181.

It is a super-2 number, since 2×18118434² = 656555301224712, which contains 22 as substring.

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, 65509 + ... + 65784.

It is an arithmetic number, because the mean of its divisors is an integer number (2363292).

Almost surely, 2^18118434 is an apocalyptic number.

18118434 is an abundant number, since it is smaller than the sum of its proper divisors (19694238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18118434 is a wasteful number, since it uses less digits than its factorization.

18118434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131321.

The product of its digits is 3072, while the sum is 30.

The square root of 18118434 is about 4256.5753840382. The cubic root of 18118434 is about 262.6476702001.

It can be divided in two parts, 1 and 8118434, that added together give a triangular number (8118435 = T₄₀₂₉).

The spelling of 18118434 in words is "eighteen million, one hundred eighteen thousand, four hundred thirty-four".