18831817028 has 12 divisors (see below), whose sum is σ = 33137756652. Its totient is φ = 9363886560.

The previous prime is 18831817013. The next prime is 18831817033. The reversal of 18831817028 is 82071813881.

It can be written as a sum of positive squares in 2 ways, for example, as 8019560704 + 10812256324 = 89552^2 + 103982^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13004675 + ... + 13006122.

It is an arithmetic number, because the mean of its divisors is an integer number (2761479721).

Almost surely, 2^18831817028 is an apocalyptic number.

It is an amenable number.

18831817028 is a deficient number, since it is larger than the sum of its proper divisors (14305939624).

18831817028 is a wasteful number, since it uses less digits than its factorization.

18831817028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26010982 (or 26010980 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 47.

The spelling of 18831817028 in words is "eighteen billion, eight hundred thirty-one million, eight hundred seventeen thousand, twenty-eight".