18090653 has 6 divisors (see below), whose sum is σ = 21044286. Its totient is φ = 15506232.

The previous prime is 18090643. The next prime is 18090689. The reversal of 18090653 is 35609081.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 2393209 = 3962^2 + 1547^2 .

It is not a de Polignac number, because 18090653 - 2⁴ = 18090637 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 (18090623) 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, 184550 + ... + 184647.

It is an arithmetic number, because the mean of its divisors is an integer number (3507381).

Almost surely, 2^18090653 is an apocalyptic number.

It is an amenable number.

18090653 is a deficient number, since it is larger than the sum of its proper divisors (2953633).

18090653 is an equidigital number, since it uses as much as digits as its factorization.

18090653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369211 (or 369204 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 18090653 is about 4253.3108280491. The cubic root of 18090653 is about 262.5133622828.

The spelling of 18090653 in words is "eighteen million, ninety thousand, six hundred fifty-three".