18371828 has 6 divisors (see below), whose sum is σ = 32150706. Its totient is φ = 9185912.

The previous prime is 18371827. The next prime is 18371831. The reversal of 18371828 is 82817381.

It can be written as a sum of positive squares in only one way, i.e., 14577124 + 3794704 = 3818^2 + 1948^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18371791 and 18371800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18371827) by changing a digit.

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, 2296475 + ... + 2296482.

It is an arithmetic number, because the mean of its divisors is an integer number (5358451).

Almost surely, 2^18371828 is an apocalyptic number.

It is an amenable number.

18371828 is a deficient number, since it is larger than the sum of its proper divisors (13778878).

18371828 is a wasteful number, since it uses less digits than its factorization.

18371828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592961 (or 4592959 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 18371828 is about 4286.2370443082. The cubic root of 18371828 is about 263.8664192593.

The spelling of 18371828 in words is "eighteen million, three hundred seventy-one thousand, eight hundred twenty-eight".