18090779 has 8 divisors (see below), whose sum is σ = 20702208. Its totient is φ = 15486120.

The previous prime is 18090773. The next prime is 18090797. The reversal of 18090779 is 97709081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18090779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18090773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7094 + ... + 9300.

It is an arithmetic number, because the mean of its divisors is an integer number (2587776).

Almost surely, 2^18090779 is an apocalyptic number.

18090779 is a deficient number, since it is larger than the sum of its proper divisors (2611429).

18090779 is a wasteful number, since it uses less digits than its factorization.

18090779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 18090779 is about 4253.3256400139. The cubic root of 18090779 is about 262.5139717431.

The spelling of 18090779 in words is "eighteen million, ninety thousand, seven hundred seventy-nine".