18638097 has 16 divisors (see below), whose sum is σ = 25832640. Its totient is φ = 11938752.

The previous prime is 18638089. The next prime is 18638101. The reversal of 18638097 is 79083681.

It is not a de Polignac number, because 18638097 - 2³ = 18638089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18638197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24243 + ... + 24999.

It is an arithmetic number, because the mean of its divisors is an integer number (1614540).

Almost surely, 2^18638097 is an apocalyptic number.

It is an amenable number.

18638097 is a deficient number, since it is larger than the sum of its proper divisors (7194543).

18638097 is a wasteful number, since it uses less digits than its factorization.

18638097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 18638097 is about 4317.1862364276. The cubic root of 18638097 is about 265.1350776883.

It can be divided in two parts, 186 and 38097, that added together give a palindrome (38283).

The spelling of 18638097 in words is "eighteen million, six hundred thirty-eight thousand, ninety-seven".