18468899 has 2 divisors, whose sum is σ = 18468900. Its totient is φ = 18468898.

The previous prime is 18468871. The next prime is 18468917. The reversal of 18468899 is 99886481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18468899 - 2²⁰ = 17420323 is a prime.

It is a super-2 number, since 2×18468899² = 682200460544402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18468899.

It is not a weakly prime, because it can be changed into another prime (18468859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234449 + 9234450.

It is an arithmetic number, because the mean of its divisors is an integer number (9234450).

Almost surely, 2^18468899 is an apocalyptic number.

18468899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468899 is an equidigital number, since it uses as much as digits as its factorization.

18468899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 53.

The square root of 18468899 is about 4297.5456949287. The cubic root of 18468899 is about 264.3303324022.

The spelling of 18468899 in words is "eighteen million, four hundred sixty-eight thousand, eight hundred ninety-nine".