18668683337 has 2 divisors, whose sum is σ = 18668683338. Its totient is φ = 18668683336.

The previous prime is 18668683303. The next prime is 18668683367. The reversal of 18668683337 is 73338686681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15426633616 + 3242049721 = 124204^2 + 56939^2 .

It is a cyclic number.

It is not a de Polignac number, because 18668683337 - 2⁶ = 18668683273 is a prime.

It is not a weakly prime, because it can be changed into another prime (18668683367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334341668 + 9334341669.

It is an arithmetic number, because the mean of its divisors is an integer number (9334341669).

Almost surely, 2^18668683337 is an apocalyptic number.

It is an amenable number.

18668683337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18668683337 is an equidigital number, since it uses as much as digits as its factorization.

18668683337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 59.

The spelling of 18668683337 in words is "eighteen billion, six hundred sixty-eight million, six hundred eighty-three thousand, three hundred thirty-seven".