18130279 has 16 divisors (see below), whose sum is σ = 20295360. Its totient is φ = 16107520.

The previous prime is 18130253. The next prime is 18130291. The reversal of 18130279 is 97203181.

It is a cyclic number.

It is not a de Polignac number, because 18130279 - 2¹³ = 18122087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18130279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130379) 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, 34539 + ... + 35059.

It is an arithmetic number, because the mean of its divisors is an integer number (1268460).

Almost surely, 2^18130279 is an apocalyptic number.

18130279 is a deficient number, since it is larger than the sum of its proper divisors (2165081).

18130279 is a wasteful number, since it uses less digits than its factorization.

18130279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 18130279 is about 4257.9665334523. The cubic root of 18130279 is about 262.7048933932.

The spelling of 18130279 in words is "eighteen million, one hundred thirty thousand, two hundred seventy-nine".