20017974139800 has 384 divisors, whose sum is σ = 78001307596800. Its totient is φ = 4133708789760.

The previous prime is 20017974139747. The next prime is 20017974139841. The reversal of 20017974139800 is 893147971002.

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, 1334115 + ... + 6466514.

It is an arithmetic number, because the mean of its divisors is an integer number (203128405200).

Almost surely, 2^{20017974139800} is an apocalyptic number.

20017974139800 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 20017974139800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39000653798400).

20017974139800 is an abundant number, since it is smaller than the sum of its proper divisors (57983333457000).

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

20017974139800 is a wasteful number, since it uses less digits than its factorization.

20017974139800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800715 (or 7800706 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 20017974139800 in words is "twenty trillion, seventeen billion, nine hundred seventy-four million, one hundred thirty-nine thousand, eight hundred".