18630227617 has 2 divisors, whose sum is σ = 18630227618. Its totient is φ = 18630227616.

The previous prime is 18630227611. The next prime is 18630227653. The reversal of 18630227617 is 71672203681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12933148176 + 5697079441 = 113724^2 + 75479^2 .

It is a cyclic number.

It is not a de Polignac number, because 18630227617 - 2⁷ = 18630227489 is a prime.

It is a super-2 number, since 2×18630227617² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18630227611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9315113808 + 9315113809.

It is an arithmetic number, because the mean of its divisors is an integer number (9315113809).

Almost surely, 2^18630227617 is an apocalyptic number.

It is an amenable number.

18630227617 is a deficient number, since it is larger than the sum of its proper divisors (1).

18630227617 is an equidigital number, since it uses as much as digits as its factorization.

18630227617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 18630227617 in words is "eighteen billion, six hundred thirty million, two hundred twenty-seven thousand, six hundred seventeen".