18311119 has 2 divisors, whose sum is σ = 18311120. Its totient is φ = 18311118.

The previous prime is 18311107. The next prime is 18311123. The reversal of 18311119 is 91111381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18311119 - 2⁵ = 18311087 is a prime.

It is a super-2 number, since 2×18311119² = 670594158064322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18311093 and 18311102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18311179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9155559 + 9155560.

It is an arithmetic number, because the mean of its divisors is an integer number (9155560).

Almost surely, 2^18311119 is an apocalyptic number.

18311119 is a deficient number, since it is larger than the sum of its proper divisors (1).

18311119 is an equidigital number, since it uses as much as digits as its factorization.

18311119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 25.

The square root of 18311119 is about 4279.1493313508. The cubic root of 18311119 is about 263.5754530454.

The spelling of 18311119 in words is "eighteen million, three hundred eleven thousand, one hundred nineteen".