20843081394336 has 192 divisors, whose sum is σ = 60998317954560. Its totient is φ = 6924161664000.

The previous prime is 20843081394329. The next prime is 20843081394341. The reversal of 20843081394336 is 63349318034802.

20843081394336 is a `hidden beast` number, since 2 + 0 + 8 + 430 + 8 + 139 + 43 + 36 = 666.

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 31 ways as a sum of consecutive naturals, for example, 1984861086 + ... + 1984871586.

It is an arithmetic number, because the mean of its divisors is an integer number (317699572680).

Almost surely, 2^{20843081394336} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20843081394336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30499158977280).

20843081394336 is an abundant number, since it is smaller than the sum of its proper divisors (40155236560224).

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

20843081394336 is a wasteful number, since it uses less digits than its factorization.

20843081394336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18084 (or 18070 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 20843081394336 in words is "twenty trillion, eight hundred forty-three billion, eighty-one million, three hundred ninety-four thousand, three hundred thirty-six".