18702740137 has 2 divisors, whose sum is σ = 18702740138. Its totient is φ = 18702740136.

The previous prime is 18702740047. The next prime is 18702740153. The reversal of 18702740137 is 73104720781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9946272361 + 8756467776 = 99731^2 + 93576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18702740137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18702740137.

It is not a weakly prime, because it can be changed into another prime (18702740167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9351370068 + 9351370069.

It is an arithmetic number, because the mean of its divisors is an integer number (9351370069).

Almost surely, 2^18702740137 is an apocalyptic number.

It is an amenable number.

18702740137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18702740137 is an equidigital number, since it uses as much as digits as its factorization.

18702740137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 40.

The spelling of 18702740137 in words is "eighteen billion, seven hundred two million, seven hundred forty thousand, one hundred thirty-seven".