18098431 has 16 divisors (see below), whose sum is σ = 20966400. Its totient is φ = 15480288.

The previous prime is 18098413. The next prime is 18098441. The reversal of 18098431 is 13489081.

It is a happy number.

It is not a de Polignac number, because 18098431 - 2¹¹ = 18096383 is a prime.

It is a super-2 number, since 2×18098431² = 655106409323522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18098411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10830 + ... + 12388.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^18098431 is an apocalyptic number.

18098431 is a deficient number, since it is larger than the sum of its proper divisors (2867969).

18098431 is a wasteful number, since it uses less digits than its factorization.

18098431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18098431 is about 4254.2250763212. The cubic root of 18098431 is about 262.5509790634.

The spelling of 18098431 in words is "eighteen million, ninety-eight thousand, four hundred thirty-one".