18327990279 has 4 divisors (see below), whose sum is σ = 24437320376. Its totient is φ = 12218660184.

The previous prime is 18327990257. The next prime is 18327990281. The reversal of 18327990279 is 97209972381.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18327990279 - 2¹⁶ = 18327924743 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 (18327990229) 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, 3054665044 + ... + 3054665049.

It is an arithmetic number, because the mean of its divisors is an integer number (6109330094).

Almost surely, 2^18327990279 is an apocalyptic number.

18327990279 is a deficient number, since it is larger than the sum of its proper divisors (6109330097).

18327990279 is an equidigital number, since it uses as much as digits as its factorization.

18327990279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109330096.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 18327990279 in words is "eighteen billion, three hundred twenty-seven million, nine hundred ninety thousand, two hundred seventy-nine".