18072517963 has 2 divisors, whose sum is σ = 18072517964. Its totient is φ = 18072517962.

The previous prime is 18072517937. The next prime is 18072517979. The reversal of 18072517963 is 36971527081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18072517963 - 2²⁵ = 18038963531 is a prime.

It is not a weakly prime, because it can be changed into another prime (18072517933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9036258981 + 9036258982.

It is an arithmetic number, because the mean of its divisors is an integer number (9036258982).

Almost surely, 2^18072517963 is an apocalyptic number.

18072517963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18072517963 is an equidigital number, since it uses as much as digits as its factorization.

18072517963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 18072517963 in words is "eighteen billion, seventy-two million, five hundred seventeen thousand, nine hundred sixty-three".