20833434720 has 288 divisors, whose sum is σ = 86030538048. Its totient is φ = 4481777664.

The previous prime is 20833434719. The next prime is 20833434733. The reversal of 20833434720 is 2743433802.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110572 + ... + 232148.

It is an arithmetic number, because the mean of its divisors is an integer number (298717146).

Almost surely, 2^20833434720 is an apocalyptic number.

20833434720 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 20833434720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43015269024).

20833434720 is an abundant number, since it is smaller than the sum of its proper divisors (65197103328).

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

20833434720 is a wasteful number, since it uses less digits than its factorization.

20833434720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121622 (or 121611 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 20833434720 in words is "twenty billion, eight hundred thirty-three million, four hundred thirty-four thousand, seven hundred twenty".