18445976651 has 2 divisors, whose sum is σ = 18445976652. Its totient is φ = 18445976650.

The previous prime is 18445976639. The next prime is 18445976657. The reversal of 18445976651 is 15667954481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18445976651 - 2³⁴ = 1266107467 is a prime.

It is not a weakly prime, because it can be changed into another prime (18445976657) 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, 9222988325 + 9222988326.

It is an arithmetic number, because the mean of its divisors is an integer number (9222988326).

Almost surely, 2^18445976651 is an apocalyptic number.

18445976651 is a deficient number, since it is larger than the sum of its proper divisors (1).

18445976651 is an equidigital number, since it uses as much as digits as its factorization.

18445976651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 56.

The spelling of 18445976651 in words is "eighteen billion, four hundred forty-five million, nine hundred seventy-six thousand, six hundred fifty-one".