18090669 has 16 divisors (see below), whose sum is σ = 26232768. Its totient is φ = 11043072.

The previous prime is 18090643. The next prime is 18090689. The reversal of 18090669 is 96609081.

It is not a de Polignac number, because 18090669 - 2⁵ = 18090637 is a prime.

It is a super-2 number, since 2×18090669² = 654544609735122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2907 + ... + 6680.

It is an arithmetic number, because the mean of its divisors is an integer number (1639548).

Almost surely, 2^18090669 is an apocalyptic number.

It is an amenable number.

18090669 is a deficient number, since it is larger than the sum of its proper divisors (8142099).

18090669 is a wasteful number, since it uses less digits than its factorization.

18090669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 18090669 is about 4253.3127089364. The cubic root of 18090669 is about 262.5134396747.

The spelling of 18090669 in words is "eighteen million, ninety thousand, six hundred sixty-nine".