18097279890 has 16 divisors (see below), whose sum is σ = 43433471808. Its totient is φ = 4825941296.

The previous prime is 18097279843. The next prime is 18097279927. The reversal of 18097279890 is 9897279081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301621302 + ... + 301621361.

It is an arithmetic number, because the mean of its divisors is an integer number (2714591988).

Almost surely, 2^18097279890 is an apocalyptic number.

18097279890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18097279890 is an abundant number, since it is smaller than the sum of its proper divisors (25336191918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18097279890 is a wasteful number, since it uses less digits than its factorization.

18097279890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603242673.

The product of its (nonzero) digits is 4572288, while the sum is 60.

The spelling of 18097279890 in words is "eighteen billion, ninety-seven million, two hundred seventy-nine thousand, eight hundred ninety".