18873299 has 2 divisors, whose sum is σ = 18873300. Its totient is φ = 18873298.

The previous prime is 18873227. The next prime is 18873307. The reversal of 18873299 is 99237881.

It is a strong prime.

It is an emirp because it is prime and its reverse (99237881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18873299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18873199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9436649 + 9436650.

It is an arithmetic number, because the mean of its divisors is an integer number (9436650).

Almost surely, 2^18873299 is an apocalyptic number.

18873299 is a deficient number, since it is larger than the sum of its proper divisors (1).

18873299 is an equidigital number, since it uses as much as digits as its factorization.

18873299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 18873299 is about 4344.3410317331. The cubic root of 18873299 is about 266.2457026498.

The spelling of 18873299 in words is "eighteen million, eight hundred seventy-three thousand, two hundred ninety-nine".