18311107 has 2 divisors, whose sum is σ = 18311108. Its totient is φ = 18311106.

The previous prime is 18311087. The next prime is 18311119. The reversal of 18311107 is 70111381.

It is a strong prime.

It is an emirp because it is prime and its reverse (70111381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18311107 - 2¹¹ = 18309059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18311147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9155553 + 9155554.

It is an arithmetic number, because the mean of its divisors is an integer number (9155554).

Almost surely, 2^18311107 is an apocalyptic number.

18311107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18311107 is an equidigital number, since it uses as much as digits as its factorization.

18311107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 18311107 is about 4279.1479292027. The cubic root of 18311107 is about 263.5753954682.

Adding to 18311107 its reverse (70111381), we get a palindrome (88422488).

The spelling of 18311107 in words is "eighteen million, three hundred eleven thousand, one hundred seven".