18680792129 has 2 divisors, whose sum is σ = 18680792130. Its totient is φ = 18680792128.

The previous prime is 18680792113. The next prime is 18680792173. The reversal of 18680792129 is 92129708681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18185061904 + 495730225 = 134852^2 + 22265^2 .

It is an emirp because it is prime and its reverse (92129708681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18680792129 - 2⁴ = 18680792113 is a prime.

It is not a weakly prime, because it can be changed into another prime (18680792189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9340396064 + 9340396065.

It is an arithmetic number, because the mean of its divisors is an integer number (9340396065).

Almost surely, 2^18680792129 is an apocalyptic number.

It is an amenable number.

18680792129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18680792129 is an equidigital number, since it uses as much as digits as its factorization.

18680792129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 18680792129 in words is "eighteen billion, six hundred eighty million, seven hundred ninety-two thousand, one hundred twenty-nine".