18057369 has 32 divisors (see below), whose sum is σ = 28191744. Its totient is φ = 10169280.

The previous prime is 18057329. The next prime is 18057379. The reversal of 18057369 is 96375081.

It is not a de Polignac number, because 18057369 - 2¹⁶ = 17991833 is a prime.

It is a super-2 number, since 2×18057369² = 652137150404322, which contains 22 as substring.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18057329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27762 + ... + 28404.

It is an arithmetic number, because the mean of its divisors is an integer number (880992).

Almost surely, 2^18057369 is an apocalyptic number.

It is an amenable number.

18057369 is a deficient number, since it is larger than the sum of its proper divisors (10134375).

18057369 is a wasteful number, since it uses less digits than its factorization.

18057369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 18057369 is about 4249.3963100657. The cubic root of 18057369 is about 262.3522688021.

The spelling of 18057369 in words is "eighteen million, fifty-seven thousand, three hundred sixty-nine".