18990258279 has 16 divisors (see below), whose sum is σ = 25555276032. Its totient is φ = 12542802048.

The previous prime is 18990258247. The next prime is 18990258283. The reversal of 18990258279 is 97285209981.

It is not a de Polignac number, because 18990258279 - 2⁵ = 18990258247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18990258229) 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, 886752 + ... + 907914.

It is an arithmetic number, because the mean of its divisors is an integer number (1597204752).

Almost surely, 2^18990258279 is an apocalyptic number.

18990258279 is a deficient number, since it is larger than the sum of its proper divisors (6565017753).

18990258279 is a wasteful number, since it uses less digits than its factorization.

18990258279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23926.

The product of its (nonzero) digits is 6531840, while the sum is 60.

The spelling of 18990258279 in words is "eighteen billion, nine hundred ninety million, two hundred fifty-eight thousand, two hundred seventy-nine".