18673479137 has 2 divisors, whose sum is σ = 18673479138. Its totient is φ = 18673479136.

The previous prime is 18673479113. The next prime is 18673479157. The reversal of 18673479137 is 73197437681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11107262881 + 7566216256 = 105391^2 + 86984^2 .

It is a cyclic number.

It is not a de Polignac number, because 18673479137 - 2⁶ = 18673479073 is a prime.

It is not a weakly prime, because it can be changed into another prime (18673479107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9336739568 + 9336739569.

It is an arithmetic number, because the mean of its divisors is an integer number (9336739569).

Almost surely, 2^18673479137 is an apocalyptic number.

It is an amenable number.

18673479137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18673479137 is an equidigital number, since it uses as much as digits as its factorization.

18673479137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 56.

The spelling of 18673479137 in words is "eighteen billion, six hundred seventy-three million, four hundred seventy-nine thousand, one hundred thirty-seven".