18256999928 has 8 divisors (see below), whose sum is σ = 34231874880. Its totient is φ = 9128499960.

The previous prime is 18256999883. The next prime is 18256999939. The reversal of 18256999928 is 82999965281.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×18256999928⁴ (a number of 42 digits) contains 4444 as substring.

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, 1141062488 + ... + 1141062503.

It is an arithmetic number, because the mean of its divisors is an integer number (4278984360).

Almost surely, 2^18256999928 is an apocalyptic number.

It is an amenable number.

18256999928 is a deficient number, since it is larger than the sum of its proper divisors (15974874952).

18256999928 is a wasteful number, since it uses less digits than its factorization.

18256999928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282124997 (or 2282124993 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 68.

The spelling of 18256999928 in words is "eighteen billion, two hundred fifty-six million, nine hundred ninety-nine thousand, nine hundred twenty-eight".