18662952709 has 2 divisors, whose sum is σ = 18662952710. Its totient is φ = 18662952708.

The previous prime is 18662952667. The next prime is 18662952713. The reversal of 18662952709 is 90725926681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18391428225 + 271524484 = 135615^2 + 16478^2 .

It is a cyclic number.

It is not a de Polignac number, because 18662952709 - 2²⁷ = 18528734981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18662952709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18662952109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9331476354 + 9331476355.

It is an arithmetic number, because the mean of its divisors is an integer number (9331476355).

Almost surely, 2^18662952709 is an apocalyptic number.

It is an amenable number.

18662952709 is a deficient number, since it is larger than the sum of its proper divisors (1).

18662952709 is an equidigital number, since it uses as much as digits as its factorization.

18662952709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 18662952709 in words is "eighteen billion, six hundred sixty-two million, nine hundred fifty-two thousand, seven hundred nine".