18033857816 has 32 divisors (see below), whose sum is σ = 36449988960. Its totient is φ = 8315212032.

The previous prime is 18033857801. The next prime is 18033857837. The reversal of 18033857816 is 61875833081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23501 + ... + 191363.

It is an arithmetic number, because the mean of its divisors is an integer number (1139062155).

Almost surely, 2^18033857816 is an apocalyptic number.

It is an amenable number.

18033857816 is an abundant number, since it is smaller than the sum of its proper divisors (18416131144).

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

18033857816 is a wasteful number, since it uses less digits than its factorization.

18033857816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168915 (or 168911 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 18033857816 in words is "eighteen billion, thirty-three million, eight hundred fifty-seven thousand, eight hundred sixteen".