18097279889 has 16 divisors (see below), whose sum is σ = 19775926464. Its totient is φ = 16461144000.

The previous prime is 18097279843. The next prime is 18097279927. The reversal of 18097279889 is 98897279081.

It is a cyclic number.

It is not a de Polignac number, because 18097279889 - 2²⁸ = 17828844433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18097270889) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 244382 + ... + 309704.

It is an arithmetic number, because the mean of its divisors is an integer number (1235995404).

Almost surely, 2^18097279889 is an apocalyptic number.

It is an amenable number.

18097279889 is a deficient number, since it is larger than the sum of its proper divisors (1678646575).

18097279889 is a wasteful number, since it uses less digits than its factorization.

18097279889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65648.

The product of its (nonzero) digits is 36578304, while the sum is 68.

The spelling of 18097279889 in words is "eighteen billion, ninety-seven million, two hundred seventy-nine thousand, eight hundred eighty-nine".