18028041800 has 24 divisors (see below), whose sum is σ = 41915197650. Its totient is φ = 7211216640.

The previous prime is 18028041793. The next prime is 18028041839. The reversal of 18028041800 is 814082081.

It can be written as a sum of positive squares in 3 ways, for example, as 10981782436 + 7046259364 = 104794^2 + 83942^2 .

It is a super-2 number, since 2×18028041800² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45069905 + ... + 45070304.

Almost surely, 2^18028041800 is an apocalyptic number.

18028041800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18028041800 is an abundant number, since it is smaller than the sum of its proper divisors (23887155850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18028041800 is a wasteful number, since it uses less digits than its factorization.

18028041800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90140225 (or 90140216 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The spelling of 18028041800 in words is "eighteen billion, twenty-eight million, forty-one thousand, eight hundred".