18955828 has 6 divisors (see below), whose sum is σ = 33172706. Its totient is φ = 9477912.

The previous prime is 18955801. The next prime is 18955861. The reversal of 18955828 is 82855981.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 2650384 = 4038^2 + 1628^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2369475 + ... + 2369482.

Almost surely, 2^18955828 is an apocalyptic number.

It is an amenable number.

18955828 is a deficient number, since it is larger than the sum of its proper divisors (14216878).

18955828 is a wasteful number, since it uses less digits than its factorization.

18955828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738961 (or 4738959 counting only the distinct ones).

The product of its digits is 230400, while the sum is 46.

The square root of 18955828 is about 4353.8291192926. The cubic root of 18955828 is about 266.6332173322.

The spelling of 18955828 in words is "eighteen million, nine hundred fifty-five thousand, eight hundred twenty-eight".