18107797 has 4 divisors (see below), whose sum is σ = 18116416. Its totient is φ = 18099180.

The previous prime is 18107777. The next prime is 18107801. The reversal of 18107797 is 79770181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18107797 - 2¹¹ = 18105749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18107707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138 + ... + 6124.

It is an arithmetic number, because the mean of its divisors is an integer number (4529104).

Almost surely, 2^18107797 is an apocalyptic number.

It is an amenable number.

18107797 is a deficient number, since it is larger than the sum of its proper divisors (8619).

18107797 is an equidigital number, since it uses as much as digits as its factorization.

18107797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 18107797 is about 4255.3257219630. The cubic root of 18107797 is about 262.5962615965.

The spelling of 18107797 in words is "eighteen million, one hundred seven thousand, seven hundred ninety-seven".