18098018 has 8 divisors (see below), whose sum is σ = 27320412. Its totient is φ = 8991216.

The previous prime is 18097997. The next prime is 18098021. The reversal of 18098018 is 81089081.

It can be written as a sum of positive squares in 2 ways, for example, as 18037009 + 61009 = 4247^2 + 247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28505 + ... + 29132.

Almost surely, 2^18098018 is an apocalyptic number.

18098018 is a deficient number, since it is larger than the sum of its proper divisors (9222394).

18098018 is a wasteful number, since it uses less digits than its factorization.

18098018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57796.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 18098018 is about 4254.1765360643. The cubic root of 18098018 is about 262.5489819404.

The spelling of 18098018 in words is "eighteen million, ninety-eight thousand, eighteen".