18533404768 has 12 divisors (see below), whose sum is σ = 36487640700. Its totient is φ = 9266702368.

The previous prime is 18533404751. The next prime is 18533404781. The reversal of 18533404768 is 86740433581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289584418 + ... + 289584481.

It is an arithmetic number, because the mean of its divisors is an integer number (3040636725).

Almost surely, 2^18533404768 is an apocalyptic number.

It is an amenable number.

18533404768 is a deficient number, since it is larger than the sum of its proper divisors (17954235932).

18533404768 is an equidigital number, since it uses as much as digits as its factorization.

18533404768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579168909 (or 579168901 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 18533404768 in words is "eighteen billion, five hundred thirty-three million, four hundred four thousand, seven hundred sixty-eight".