18090277 has 4 divisors (see below), whose sum is σ = 18191520. Its totient is φ = 17989036.

The previous prime is 18090271. The next prime is 18090301. The reversal of 18090277 is 77209081.

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: 77209081 = 4517 ⋅17093.

It is a cyclic number.

It is not a de Polignac number, because 18090277 - 2³ = 18090269 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 (18090271) 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, 50353 + ... + 50710.

It is an arithmetic number, because the mean of its divisors is an integer number (4547880).

Almost surely, 2^18090277 is an apocalyptic number.

It is an amenable number.

18090277 is a deficient number, since it is larger than the sum of its proper divisors (101243).

18090277 is a wasteful number, since it uses less digits than its factorization.

18090277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101242.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 18090277 is about 4253.2666269586. The cubic root of 18090277 is about 262.5115435589.

The spelling of 18090277 in words is "eighteen million, ninety thousand, two hundred seventy-seven".