2021300656 has 80 divisors (see below), whose sum is σ = 4143984768. Its totient is φ = 953971200.

The previous prime is 2021300623. The next prime is 2021300681. The reversal of 2021300656 is 6560031202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021300656.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3694975 + ... + 3695521.

Almost surely, 2^2021300656 is an apocalyptic number.

It is an amenable number.

2021300656 is an abundant number, since it is smaller than the sum of its proper divisors (2122684112).

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

2021300656 is a wasteful number, since it uses less digits than its factorization.

2021300656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2021300656 is about 44958.8773881199. The cubic root of 2021300656 is about 1264.3781215328.

Adding to 2021300656 its reverse (6560031202), we get a palindrome (8581331858).

The spelling of 2021300656 in words is "two billion, twenty-one million, three hundred thousand, six hundred fifty-six".