19798732800 has 1560 divisors, whose sum is σ = 94385482752. Its totient is φ = 3981312000.

The previous prime is 19798732799. The next prime is 19798732823. The reversal of 19798732800 is 823789791.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 638668785 + ... + 638668815.

Almost surely, 2^19798732800 is an apocalyptic number.

19798732800 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 19798732800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47192741376).

19798732800 is an abundant number, since it is smaller than the sum of its proper divisors (74586749952).

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

19798732800 is a wasteful number, since it uses less digits than its factorization.

19798732800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 19798732800 in words is "nineteen billion, seven hundred ninety-eight million, seven hundred thirty-two thousand, eight hundred".