2820008440621 has 2 divisors, whose sum is σ = 2820008440622. Its totient is φ = 2820008440620.

The previous prime is 2820008440609. The next prime is 2820008440723. The reversal of 2820008440621 is 1260448000282.

2820008440621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2050019740521 + 769988700100 = 1431789^2 + 877490^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820008440621 - 2¹⁷ = 2820008309549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820008446621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410004220310 + 1410004220311.

It is an arithmetic number, because the mean of its divisors is an integer number (1410004220311).

Almost surely, 2^{2820008440621} is an apocalyptic number.

It is an amenable number.

2820008440621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820008440621 is an equidigital number, since it uses as much as digits as its factorization.

2820008440621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 37.

The spelling of 2820008440621 in words is "two trillion, eight hundred twenty billion, eight million, four hundred forty thousand, six hundred twenty-one".