21302223037 has 2 divisors, whose sum is σ = 21302223038. Its totient is φ = 21302223036.

The previous prime is 21302223029. The next prime is 21302223049. The reversal of 21302223037 is 73032220312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10911682681 + 10390540356 = 104459^2 + 101934^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302223037 - 2³ = 21302223029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302223077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651111518 + 10651111519.

It is an arithmetic number, because the mean of its divisors is an integer number (10651111519).

Almost surely, 2^21302223037 is an apocalyptic number.

It is an amenable number.

21302223037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302223037 is an equidigital number, since it uses as much as digits as its factorization.

21302223037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 25.

Adding to 21302223037 its reverse (73032220312), we get a palindrome (94334443349).

The spelling of 21302223037 in words is "twenty-one billion, three hundred two million, two hundred twenty-three thousand, thirty-seven".