20783021104000 has 256 divisors, whose sum is σ = 55283064782400. Its totient is φ = 7746554880000.

The previous prime is 20783021103953. The next prime is 20783021104007. The reversal of 20783021104000 is 40112038702.

It is a self number, because there is not a number n which added to its sum of digits gives 20783021104000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20783021104007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17983630 + ... + 19104370.

Almost surely, 2^{20783021104000} is an apocalyptic number.

20783021104000 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 20783021104000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27641532391200).

20783021104000 is an abundant number, since it is smaller than the sum of its proper divisors (34500043678400).

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

20783021104000 is a wasteful number, since it uses less digits than its factorization.

20783021104000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120850 (or 1120828 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 20783021104000 in words is "twenty trillion, seven hundred eighty-three billion, twenty-one million, one hundred four thousand".