18940766880 has 768 divisors, whose sum is σ = 74243506176. Its totient is φ = 3968040960.

The previous prime is 18940766861. The next prime is 18940766881. The reversal of 18940766880 is 8866704981.

It is a self number, because there is not a number n which added to its sum of digits gives 18940766880.

It is not an unprimeable number, because it can be changed into a prime (18940766881) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 259462524 + ... + 259462596.

It is an arithmetic number, because the mean of its divisors is an integer number (96671232).

Almost surely, 2^18940766880 is an apocalyptic number.

18940766880 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 18940766880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37121753088).

18940766880 is an abundant number, since it is smaller than the sum of its proper divisors (55302739296).

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

18940766880 is a wasteful number, since it uses less digits than its factorization.

18940766880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 18940766880 in words is "eighteen billion, nine hundred forty million, seven hundred sixty-six thousand, eight hundred eighty".