21023332020937 has 2 divisors, whose sum is σ = 21023332020938. Its totient is φ = 21023332020936.

The previous prime is 21023332020893. The next prime is 21023332020989. The reversal of 21023332020937 is 73902023332012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14156526650256 + 6866805370681 = 3762516^2 + 2620459^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023332020937 - 2¹⁹ = 21023331496649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21023332020896 and 21023332020905.

It is not a weakly prime, because it can be changed into another prime (21023332020437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511666010468 + 10511666010469.

It is an arithmetic number, because the mean of its divisors is an integer number (10511666010469).

Almost surely, 2^{21023332020937} is an apocalyptic number.

It is an amenable number.

21023332020937 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023332020937 is an equidigital number, since it uses as much as digits as its factorization.

21023332020937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 37.

Adding to 21023332020937 its reverse (73902023332012), we get a palindrome (94925355352949).

The spelling of 21023332020937 in words is "twenty-one trillion, twenty-three billion, three hundred thirty-two million, twenty thousand, nine hundred thirty-seven".