18163928 has 16 divisors (see below), whose sum is σ = 35538480. Its totient is φ = 8687008.

The previous prime is 18163919. The next prime is 18163961. The reversal of 18163928 is 82936181.

It is a junction number, because it is equal to n+sod(n) for n = 18163891 and 18163900.

It is a congruent number.

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, 49175 + ... + 49542.

It is an arithmetic number, because the mean of its divisors is an integer number (2221155).

Almost surely, 2^18163928 is an apocalyptic number.

It is an amenable number.

18163928 is a deficient number, since it is larger than the sum of its proper divisors (17374552).

18163928 is a wasteful number, since it uses less digits than its factorization.

18163928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98746 (or 98742 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 18163928 is about 4261.9160010493. The cubic root of 18163928 is about 262.8673158589.

It can be divided in two parts, 18163 and 928, that added together give a palindrome (19091).

The spelling of 18163928 in words is "eighteen million, one hundred sixty-three thousand, nine hundred twenty-eight".