18349319 has 2 divisors, whose sum is σ = 18349320. Its totient is φ = 18349318.

The previous prime is 18349277. The next prime is 18349321. The reversal of 18349319 is 91394381.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18349319 - 2⁸ = 18349063 is a prime.

It is a super-2 number, since 2×18349319² = 673395015527522, which contains 22 as substring.

Together with 18349321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18349339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174659 + 9174660.

It is an arithmetic number, because the mean of its divisors is an integer number (9174660).

Almost surely, 2^18349319 is an apocalyptic number.

18349319 is a deficient number, since it is larger than the sum of its proper divisors (1).

18349319 is an equidigital number, since it uses as much as digits as its factorization.

18349319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 18349319 is about 4283.6105098386. The cubic root of 18349319 is about 263.7586129574.

It can be divided in two parts, 18349 and 319, that multiplied together give a triangular number (5853331 = T₃₄₂₁).

The spelling of 18349319 in words is "eighteen million, three hundred forty-nine thousand, three hundred nineteen".