20843103744 has 120 divisors (see below), whose sum is σ = 61622352792. Its totient is φ = 6778183680.

The previous prime is 20843103731. The next prime is 20843103751. The reversal of 20843103744 is 44730134802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20843103699 and 20843103708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133767 + ... + 244089.

Almost surely, 2^20843103744 is an apocalyptic number.

20843103744 is a gapful number since it is divisible by the number (24) 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 20843103744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30811176396).

20843103744 is an abundant number, since it is smaller than the sum of its proper divisors (40779249048).

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

20843103744 is a wasteful number, since it uses less digits than its factorization.

20843103744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110388 (or 110369 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 20843103744 in words is "twenty billion, eight hundred forty-three million, one hundred three thousand, seven hundred forty-four".