18927900000 has 216 divisors, whose sum is σ = 67281662448. Its totient is φ = 5047200000.

The previous prime is 18927899999. The next prime is 18927900029. The reversal of 18927900000 is 972981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 889485 + ... + 910515.

It is an arithmetic number, because the mean of its divisors is an integer number (311489178).

Almost surely, 2^18927900000 is an apocalyptic number.

18927900000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18927900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33640831224).

18927900000 is an abundant number, since it is smaller than the sum of its proper divisors (48353762448).

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

18927900000 is an equidigital number, since it uses as much as digits as its factorization.

18927900000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21072 (or 21041 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 18927900000 in words is "eighteen billion, nine hundred twenty-seven million, nine hundred thousand".