18465899 has 2 divisors, whose sum is σ = 18465900. Its totient is φ = 18465898.

The previous prime is 18465871. The next prime is 18465917. The reversal of 18465899 is 99856481.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18465899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18461899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232949 + 9232950.

It is an arithmetic number, because the mean of its divisors is an integer number (9232950).

Almost surely, 2^18465899 is an apocalyptic number.

18465899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18465899 is an equidigital number, since it uses as much as digits as its factorization.

18465899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 50.

The square root of 18465899 is about 4297.1966443252. The cubic root of 18465899 is about 264.3160194404.

The spelling of 18465899 in words is "eighteen million, four hundred sixty-five thousand, eight hundred ninety-nine".