18710957129 has 8 divisors (see below), whose sum is σ = 19816515720. Its totient is φ = 17605944576.

The previous prime is 18710957119. The next prime is 18710957143. The reversal of 18710957129 is 92175901781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 344473600 + 18366483529 = 18560^2 + 135523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18710957129 - 2²⁸ = 18442521673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18710957119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64874 + ... + 204035.

It is an arithmetic number, because the mean of its divisors is an integer number (2477064465).

Almost surely, 2^18710957129 is an apocalyptic number.

It is an amenable number.

18710957129 is a deficient number, since it is larger than the sum of its proper divisors (1105558591).

18710957129 is a wasteful number, since it uses less digits than its factorization.

18710957129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273019.

The product of its (nonzero) digits is 317520, while the sum is 50.

The spelling of 18710957129 in words is "eighteen billion, seven hundred ten million, nine hundred fifty-seven thousand, one hundred twenty-nine".