18938828590 has 64 divisors (see below), whose sum is σ = 38873779200. Its totient is φ = 6575895040.

The previous prime is 18938828549. The next prime is 18938828611. The reversal of 18938828590 is 9582883981.

It is a super-2 number, since 2×18938828590² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1509222 + ... + 1521718.

It is an arithmetic number, because the mean of its divisors is an integer number (607402800).

Almost surely, 2^18938828590 is an apocalyptic number.

18938828590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18938828590 is an abundant number, since it is smaller than the sum of its proper divisors (19934950610).

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

18938828590 is a wasteful number, since it uses less digits than its factorization.

18938828590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13137.

The product of its (nonzero) digits is 9953280, while the sum is 61.

The spelling of 18938828590 in words is "eighteen billion, nine hundred thirty-eight million, eight hundred twenty-eight thousand, five hundred ninety".