18134138 has 16 divisors (see below), whose sum is σ = 31420224. Its totient is φ = 7757760.

The previous prime is 18134131. The next prime is 18134147. The reversal of 18134138 is 83143181.

It is a super-2 number, since 2×18134138² = 657693922006088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18134138.

It is not an unprimeable number, because it can be changed into a prime (18134131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23870 + ... + 24617.

It is an arithmetic number, because the mean of its divisors is an integer number (1963764).

Almost surely, 2^18134138 is an apocalyptic number.

18134138 is a deficient number, since it is larger than the sum of its proper divisors (13286086).

18134138 is a wasteful number, since it uses less digits than its factorization.

18134138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48517.

The product of its digits is 2304, while the sum is 29.

The square root of 18134138 is about 4258.4196599208. The cubic root of 18134138 is about 262.7235308388.

The spelling of 18134138 in words is "eighteen million, one hundred thirty-four thousand, one hundred thirty-eight".