18938097 has 16 divisors (see below), whose sum is σ = 28150080. Its totient is φ = 12583296.

The previous prime is 18938093. The next prime is 18938107. The reversal of 18938097 is 79083981.

18938097 is a `hidden beast` number, since 189 + 380 + 97 = 666.

It is not a de Polignac number, because 18938097 - 2² = 18938093 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18938093) 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, 8538 + ... + 10524.

It is an arithmetic number, because the mean of its divisors is an integer number (1759380).

Almost surely, 2^18938097 is an apocalyptic number.

It is an amenable number.

18938097 is a deficient number, since it is larger than the sum of its proper divisors (9211983).

18938097 is a wasteful number, since it uses less digits than its factorization.

18938097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 18938097 is about 4351.7923893495. The cubic root of 18938097 is about 266.5500564805.

The spelling of 18938097 in words is "eighteen million, nine hundred thirty-eight thousand, ninety-seven".