18985696800 has 864 divisors, whose sum is σ = 78548097600. Its totient is φ = 3955875840.

The previous prime is 18985696787. The next prime is 18985696831. The reversal of 18985696800 is 869658981.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 64797454 + ... + 64797746.

It is an arithmetic number, because the mean of its divisors is an integer number (90912150).

Almost surely, 2^18985696800 is an apocalyptic number.

18985696800 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 18985696800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39274048800).

18985696800 is an abundant number, since it is smaller than the sum of its proper divisors (59562400800).

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

18985696800 is a wasteful number, since it uses less digits than its factorization.

18985696800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 60.

The spelling of 18985696800 in words is "eighteen billion, nine hundred eighty-five million, six hundred ninety-six thousand, eight hundred".