18216113107 has 2 divisors, whose sum is σ = 18216113108. Its totient is φ = 18216113106.

The previous prime is 18216113089. The next prime is 18216113141. The reversal of 18216113107 is 70131161281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18216113107 - 2¹¹ = 18216111059 is a prime.

It is not a weakly prime, because it can be changed into another prime (18216113147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9108056553 + 9108056554.

It is an arithmetic number, because the mean of its divisors is an integer number (9108056554).

Almost surely, 2^18216113107 is an apocalyptic number.

18216113107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18216113107 is an equidigital number, since it uses as much as digits as its factorization.

18216113107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

Adding to 18216113107 its reverse (70131161281), we get a palindrome (88347274388).

The spelling of 18216113107 in words is "eighteen billion, two hundred sixteen million, one hundred thirteen thousand, one hundred seven".