18998784000 has 1248 divisors, whose sum is σ = 85050101760. Its totient is φ = 3981312000.

The previous prime is 18998783983. The next prime is 18998784017. The reversal of 18998784000 is 48789981.

18998784000 is a `hidden beast` number, since 1 + 89 + 98 + 78 + 400 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (18998783983) and next prime (18998784017).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 612863985 + ... + 612864015.

It is an arithmetic number, because the mean of its divisors is an integer number (68149120).

Almost surely, 2^18998784000 is an apocalyptic number.

18998784000 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 18998784000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42525050880).

18998784000 is an abundant number, since it is smaller than the sum of its proper divisors (66051317760).

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

18998784000 is a wasteful number, since it uses less digits than its factorization.

18998784000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 18998784000 in words is "eighteen billion, nine hundred ninety-eight million, seven hundred eighty-four thousand".