18099257 has 8 divisors (see below), whose sum is σ = 20381952. Its totient is φ = 15922800.

The previous prime is 18099251. The next prime is 18099269. The reversal of 18099257 is 75299081.

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

It is a cyclic number.

It is not a de Polignac number, because 18099257 - 2⁴ = 18099241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18099251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26198 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (2547744).

Almost surely, 2^18099257 is an apocalyptic number.

It is an amenable number.

18099257 is a deficient number, since it is larger than the sum of its proper divisors (2282695).

18099257 is a wasteful number, since it uses less digits than its factorization.

18099257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53119.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 18099257 is about 4254.3221551735. The cubic root of 18099257 is about 262.5549732183.

The spelling of 18099257 in words is "eighteen million, ninety-nine thousand, two hundred fifty-seven".