18863337137 has 12 divisors (see below), whose sum is σ = 19357643844. Its totient is φ = 18381323520.

The previous prime is 18863337133. The next prime is 18863337149. The reversal of 18863337137 is 73173336881.

It can be written as a sum of positive squares in 2 ways, for example, as 2968179361 + 15895157776 = 54481^2 + 126076^2 .

It is not a de Polignac number, because 18863337137 - 2² = 18863337133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18863337133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 788837 + ... + 812397.

It is an arithmetic number, because the mean of its divisors is an integer number (1613136987).

Almost surely, 2^18863337137 is an apocalyptic number.

It is an amenable number.

18863337137 is a deficient number, since it is larger than the sum of its proper divisors (494306707).

18863337137 is an equidigital number, since it uses as much as digits as its factorization.

18863337137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24080 (or 24037 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The spelling of 18863337137 in words is "eighteen billion, eight hundred sixty-three million, three hundred thirty-seven thousand, one hundred thirty-seven".