18450820766 has 32 divisors (see below), whose sum is σ = 33712422912. Its totient is φ = 7393046400.

The previous prime is 18450820753. The next prime is 18450820781. The reversal of 18450820766 is 66702805481.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18450820766.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 220766 + ... + 292641.

It is an arithmetic number, because the mean of its divisors is an integer number (1053513216).

Almost surely, 2^18450820766 is an apocalyptic number.

18450820766 is a deficient number, since it is larger than the sum of its proper divisors (15261602146).

18450820766 is a wasteful number, since it uses less digits than its factorization.

18450820766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513584.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 18450820766 in words is "eighteen billion, four hundred fifty million, eight hundred twenty thousand, seven hundred sixty-six".