18090757 has 6 divisors (see below), whose sum is σ = 18406118. Its totient is φ = 17780712.

The previous prime is 18090749. The next prime is 18090773. The reversal of 18090757 is 75709081.

It can be written as a sum of positive squares in only one way, i.e., 15163236 + 2927521 = 3894^2 + 1711^2 .

It is not a de Polignac number, because 18090757 - 2³ = 18090749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 883 + ... + 6079.

Almost surely, 2^18090757 is an apocalyptic number.

It is an amenable number.

18090757 is a deficient number, since it is larger than the sum of its proper divisors (315361).

18090757 is an frugal number, since it uses more digits than its factorization.

18090757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315 (or 5256 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 18090757 is about 4253.3230538016. The cubic root of 18090757 is about 262.5138653296.

The spelling of 18090757 in words is "eighteen million, ninety thousand, seven hundred fifty-seven".