18933457008 has 40 divisors (see below), whose sum is σ = 49461008400. Its totient is φ = 6240239104.

The previous prime is 18933457007. The next prime is 18933457031. The reversal of 18933457008 is 80075433981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18933457007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211723 + ... + 2220266.

It is an arithmetic number, because the mean of its divisors is an integer number (1236525210).

Almost surely, 2^18933457008 is an apocalyptic number.

It is an amenable number.

18933457008 is an abundant number, since it is smaller than the sum of its proper divisors (30527551392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18933457008 is a wasteful number, since it uses less digits than its factorization.

18933457008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432089 (or 4432083 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 18933457008 in words is "eighteen billion, nine hundred thirty-three million, four hundred fifty-seven thousand, eight".