18098817 has 24 divisors (see below), whose sum is σ = 26927712. Its totient is φ = 10802880.

The previous prime is 18098797. The next prime is 18098819. The reversal of 18098817 is 71889081.

It is not a de Polignac number, because 18098817 - 2¹¹ = 18096769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18098819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26158 + ... + 26840.

It is an arithmetic number, because the mean of its divisors is an integer number (1121988).

Almost surely, 2^18098817 is an apocalyptic number.

It is an amenable number.

18098817 is a deficient number, since it is larger than the sum of its proper divisors (8828895).

18098817 is a wasteful number, since it uses less digits than its factorization.

18098817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 18098817 is about 4254.2704427434. The cubic root of 18098817 is about 262.5528455964.

It can be divided in two parts, 18098 and 817, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 18098817 in words is "eighteen million, ninety-eight thousand, eight hundred seventeen".