2021700736 has 128 divisors (see below), whose sum is σ = 4624957440. Its totient is φ = 871326720.

The previous prime is 2021700731. The next prime is 2021700773. The reversal of 2021700736 is 6370071202.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (2021700731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5278401 + ... + 5278783.

It is an arithmetic number, because the mean of its divisors is an integer number (36132480).

Almost surely, 2^2021700736 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 2021700736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312478720).

2021700736 is an abundant number, since it is smaller than the sum of its proper divisors (2603256704).

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

2021700736 is a wasteful number, since it uses less digits than its factorization.

2021700736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 2021700736 is about 44963.3265673260. The cubic root of 2021700736 is about 1264.4615363093.

Adding to 2021700736 its reverse (6370071202), we get a palindrome (8391771938).

The spelling of 2021700736 in words is "two billion, twenty-one million, seven hundred thousand, seven hundred thirty-six".