21828652837 has 2 divisors, whose sum is σ = 21828652838. Its totient is φ = 21828652836.

The previous prime is 21828652829. The next prime is 21828652861. The reversal of 21828652837 is 73825682812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11321172801 + 10507480036 = 106401^2 + 102506^2 .

It is a cyclic number.

It is not a de Polignac number, because 21828652837 - 2³ = 21828652829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21828652897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10914326418 + 10914326419.

It is an arithmetic number, because the mean of its divisors is an integer number (10914326419).

Almost surely, 2^21828652837 is an apocalyptic number.

It is an amenable number.

21828652837 is a deficient number, since it is larger than the sum of its proper divisors (1).

21828652837 is an equidigital number, since it uses as much as digits as its factorization.

21828652837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 52.

The spelling of 21828652837 in words is "twenty-one billion, eight hundred twenty-eight million, six hundred fifty-two thousand, eight hundred thirty-seven".