18838319 has 2 divisors, whose sum is σ = 18838320. Its totient is φ = 18838318.

The previous prime is 18838301. The next prime is 18838327. The reversal of 18838319 is 91383881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18838319 - 2¹² = 18834223 is a prime.

It is a super-2 number, since 2×18838319² = 709764525491522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18838819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9419159 + 9419160.

It is an arithmetic number, because the mean of its divisors is an integer number (9419160).

Almost surely, 2^18838319 is an apocalyptic number.

18838319 is a deficient number, since it is larger than the sum of its proper divisors (1).

18838319 is an equidigital number, since it uses as much as digits as its factorization.

18838319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 18838319 is about 4340.3132375440. The cubic root of 18838319 is about 266.0811132584.

The spelling of 18838319 in words is "eighteen million, eight hundred thirty-eight thousand, three hundred nineteen".