20393998800 has 480 divisors, whose sum is σ = 78392506368. Its totient is φ = 4431144960.

The previous prime is 20393998771. The next prime is 20393998819. The reversal of 20393998800 is 889939302.

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, 54675414 + ... + 54675786.

Almost surely, 2^20393998800 is an apocalyptic number.

20393998800 is a gapful number since it is divisible by the number (20) 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 20393998800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39196253184).

20393998800 is an abundant number, since it is smaller than the sum of its proper divisors (57998507568).

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

20393998800 is a wasteful number, since it uses less digits than its factorization.

20393998800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 20393998800 in words is "twenty billion, three hundred ninety-three million, nine hundred ninety-eight thousand, eight hundred".