18422523657 has 8 divisors (see below), whose sum is σ = 27292627680. Its totient is φ = 12281682420.

The previous prime is 18422523641. The next prime is 18422523799. The reversal of 18422523657 is 75632522481.

It is not a de Polignac number, because 18422523657 - 2⁴ = 18422523641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18422573657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341157819 + ... + 341157872.

It is an arithmetic number, because the mean of its divisors is an integer number (3411578460).

Almost surely, 2^18422523657 is an apocalyptic number.

It is an amenable number.

18422523657 is a deficient number, since it is larger than the sum of its proper divisors (8870104023).

18422523657 is an equidigital number, since it uses as much as digits as its factorization.

18422523657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682315700 (or 682315694 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 18422523657 in words is "eighteen billion, four hundred twenty-two million, five hundred twenty-three thousand, six hundred fifty-seven".