20756443120 has 240 divisors, whose sum is σ = 57142914048. Its totient is φ = 6990520320.

The previous prime is 20756443091. The next prime is 20756443171. The reversal of 20756443120 is 2134465702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86126200 + ... + 86126440.

Almost surely, 2^20756443120 is an apocalyptic number.

20756443120 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 20756443120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28571457024).

20756443120 is an abundant number, since it is smaller than the sum of its proper divisors (36386470928).

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

20756443120 is a wasteful number, since it uses less digits than its factorization.

20756443120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 20756443120 in words is "twenty billion, seven hundred fifty-six million, four hundred forty-three thousand, one hundred twenty".