18630319 has 2 divisors, whose sum is σ = 18630320. Its totient is φ = 18630318.

The previous prime is 18630301. The next prime is 18630341. The reversal of 18630319 is 91303681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18630319 - 2¹³ = 18622127 is a prime.

It is a super-2 number, since 2×18630319² = 694177572083522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18630379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9315159 + 9315160.

It is an arithmetic number, because the mean of its divisors is an integer number (9315160).

Almost surely, 2^18630319 is an apocalyptic number.

18630319 is a deficient number, since it is larger than the sum of its proper divisors (1).

18630319 is an equidigital number, since it uses as much as digits as its factorization.

18630319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 18630319 is about 4316.2853242111. The cubic root of 18630319 is about 265.0981907399.

The spelling of 18630319 in words is "eighteen million, six hundred thirty thousand, three hundred nineteen".