18376411217 has 2 divisors, whose sum is σ = 18376411218. Its totient is φ = 18376411216.

The previous prime is 18376411213. The next prime is 18376411321. The reversal of 18376411217 is 71211467381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18375429136 + 982081 = 135556^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 18376411217 - 2² = 18376411213 is a prime.

It is not a weakly prime, because it can be changed into another prime (18376411213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9188205608 + 9188205609.

It is an arithmetic number, because the mean of its divisors is an integer number (9188205609).

Almost surely, 2^18376411217 is an apocalyptic number.

It is an amenable number.

18376411217 is a deficient number, since it is larger than the sum of its proper divisors (1).

18376411217 is an equidigital number, since it uses as much as digits as its factorization.

18376411217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

Adding to 18376411217 its reverse (71211467381), we get a palindrome (89587878598).

The spelling of 18376411217 in words is "eighteen billion, three hundred seventy-six million, four hundred eleven thousand, two hundred seventeen".