18890028700 has 36 divisors (see below), whose sum is σ = 42404864040. Its totient is φ = 7295458240.

The previous prime is 18890028697. The next prime is 18890028719. The reversal of 18890028700 is 782009881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3254002 + ... + 3259801.

It is an arithmetic number, because the mean of its divisors is an integer number (1177912890).

Almost surely, 2^18890028700 is an apocalyptic number.

18890028700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18890028700 is an abundant number, since it is smaller than the sum of its proper divisors (23514835340).

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

18890028700 is a wasteful number, since it uses less digits than its factorization.

18890028700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6513846 (or 6513839 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 18890028700 in words is "eighteen billion, eight hundred ninety million, twenty-eight thousand, seven hundred".