18158097 has 8 divisors (see below), whose sum is σ = 24317440. Its totient is φ = 12052080.

The previous prime is 18158029. The next prime is 18158099. The reversal of 18158097 is 79085181.

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

It is not a de Polignac number, because 18158097 - 2¹⁵ = 18125329 is a prime.

It is a super-2 number, since 2×18158097² = 659432973322818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18158099) 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, 12529 + ... + 13902.

It is an arithmetic number, because the mean of its divisors is an integer number (3039680).

Almost surely, 2^18158097 is an apocalyptic number.

It is an amenable number.

18158097 is a deficient number, since it is larger than the sum of its proper divisors (6159343).

18158097 is a wasteful number, since it uses less digits than its factorization.

18158097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26663.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 18158097 is about 4261.2318641445. The cubic root of 18158097 is about 262.8391842167.

The spelling of 18158097 in words is "eighteen million, one hundred fifty-eight thousand, ninety-seven".