18390299 has 2 divisors, whose sum is σ = 18390300. Its totient is φ = 18390298.

The previous prime is 18390289. The next prime is 18390343. The reversal of 18390299 is 99209381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18390299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18390289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9195149 + 9195150.

It is an arithmetic number, because the mean of its divisors is an integer number (9195150).

Almost surely, 2^18390299 is an apocalyptic number.

18390299 is a deficient number, since it is larger than the sum of its proper divisors (1).

18390299 is an equidigital number, since it uses as much as digits as its factorization.

18390299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 18390299 is about 4288.3911901784. The cubic root of 18390299 is about 263.9548199009.

The spelling of 18390299 in words is "eighteen million, three hundred ninety thousand, two hundred ninety-nine".