18416997 has 32 divisors (see below), whose sum is σ = 29122560. Its totient is φ = 11476080.

The previous prime is 18416989. The next prime is 18417011. The reversal of 18416997 is 79961481.

It is a happy number.

It is not a de Polignac number, because 18416997 - 2³ = 18416989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18416977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28872 + ... + 29502.

It is an arithmetic number, because the mean of its divisors is an integer number (910080).

Almost surely, 2^18416997 is an apocalyptic number.

It is an amenable number.

18416997 is a deficient number, since it is larger than the sum of its proper divisors (10705563).

18416997 is a wasteful number, since it uses less digits than its factorization.

18416997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 704 counting only the distinct ones).

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

The square root of 18416997 is about 4291.5028836062. The cubic root of 18416997 is about 264.0824897184.

The spelling of 18416997 in words is "eighteen million, four hundred sixteen thousand, nine hundred ninety-seven".