2021470813 has 8 divisors (see below), whose sum is σ = 2050392888. Its totient is φ = 1992582144.

The previous prime is 2021470793. The next prime is 2021470817. The reversal of 2021470813 is 3180741202.

It can be written as a sum of positive squares in 4 ways, for example, as 440454169 + 1581016644 = 20987^2 + 39762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021470813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021470817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129645 + ... + 144397.

It is an arithmetic number, because the mean of its divisors is an integer number (256299111).

Almost surely, 2^2021470813 is an apocalyptic number.

It is an amenable number.

2021470813 is a deficient number, since it is larger than the sum of its proper divisors (28922075).

2021470813 is a wasteful number, since it uses less digits than its factorization.

2021470813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16703.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2021470813 is about 44960.7697109380. The cubic root of 2021470813 is about 1264.4135998028.

The spelling of 2021470813 in words is "two billion, twenty-one million, four hundred seventy thousand, eight hundred thirteen".