18351662632241 has 2 divisors, whose sum is σ = 18351662632242. Its totient is φ = 18351662632240.

The previous prime is 18351662632213. The next prime is 18351662632271. The reversal of 18351662632241 is 14223626615381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18189124646641 + 162537985600 = 4264871^2 + 403160^2 .

It is a cyclic number.

It is not a de Polignac number, because 18351662632241 - 2³⁸ = 18076784725297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18351662632241.

It is not a weakly prime, because it can be changed into another prime (18351662632271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175831316120 + 9175831316121.

It is an arithmetic number, because the mean of its divisors is an integer number (9175831316121).

Almost surely, 2^{18351662632241} is an apocalyptic number.

It is an amenable number.

18351662632241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351662632241 is an equidigital number, since it uses as much as digits as its factorization.

18351662632241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 50.

The spelling of 18351662632241 in words is "eighteen trillion, three hundred fifty-one billion, six hundred sixty-two million, six hundred thirty-two thousand, two hundred forty-one".