18334081 has 4 divisors (see below), whose sum is σ = 18607792. Its totient is φ = 18060372.

The previous prime is 18334027. The next prime is 18334087. The reversal of 18334081 is 18043381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18043381 = 173 ⋅104297.

It is a cyclic number.

It is not a de Polignac number, because 18334081 - 2⁹ = 18333569 is a prime.

It is a super-2 number, since 2×18334081² = 672277052229122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18334087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136755 + ... + 136888.

It is an arithmetic number, because the mean of its divisors is an integer number (4651948).

Almost surely, 2^18334081 is an apocalyptic number.

It is an amenable number.

18334081 is a deficient number, since it is larger than the sum of its proper divisors (273711).

18334081 is an equidigital number, since it uses as much as digits as its factorization.

18334081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273710.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18334081 is about 4281.8315006548. The cubic root of 18334081 is about 263.6855808772.

The spelling of 18334081 in words is "eighteen million, three hundred thirty-four thousand, eighty-one".