2021131837 has 2 divisors, whose sum is σ = 2021131838. Its totient is φ = 2021131836.

The previous prime is 2021131753. The next prime is 2021131891. The reversal of 2021131837 is 7381311202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2012957956 + 8173881 = 44866^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021131837 - 2¹⁹ = 2020607549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021131337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010565918 + 1010565919.

It is an arithmetic number, because the mean of its divisors is an integer number (1010565919).

Almost surely, 2^2021131837 is an apocalyptic number.

It is an amenable number.

2021131837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021131837 is an equidigital number, since it uses as much as digits as its factorization.

2021131837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2021131837 is about 44956.9998665391. Note that the first 3 decimals coincide. The cubic root of 2021131837 is about 1264.3429202723.

The spelling of 2021131837 in words is "two billion, twenty-one million, one hundred thirty-one thousand, eight hundred thirty-seven".