21014424337 has 2 divisors, whose sum is σ = 21014424338. Its totient is φ = 21014424336.

The previous prime is 21014424313. The next prime is 21014424391. The reversal of 21014424337 is 73342441012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20698864641 + 315559696 = 143871^2 + 17764^2 .

It is a cyclic number.

It is not a de Polignac number, because 21014424337 - 2⁷ = 21014424209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21014424299 and 21014424308.

It is not a weakly prime, because it can be changed into another prime (21014424437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507212168 + 10507212169.

It is an arithmetic number, because the mean of its divisors is an integer number (10507212169).

Almost surely, 2^21014424337 is an apocalyptic number.

It is an amenable number.

21014424337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21014424337 is an equidigital number, since it uses as much as digits as its factorization.

21014424337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 21014424337 its reverse (73342441012), we get a palindrome (94356865349).

The spelling of 21014424337 in words is "twenty-one billion, fourteen million, four hundred twenty-four thousand, three hundred thirty-seven".