21937105339 has 2 divisors, whose sum is σ = 21937105340. Its totient is φ = 21937105338.

The previous prime is 21937105331. The next prime is 21937105369. The reversal of 21937105339 is 93350173912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21937105339 - 2³ = 21937105331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21937105295 and 21937105304.

It is not a weakly prime, because it can be changed into another prime (21937105331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10968552669 + 10968552670.

It is an arithmetic number, because the mean of its divisors is an integer number (10968552670).

Almost surely, 2^21937105339 is an apocalyptic number.

21937105339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21937105339 is an equidigital number, since it uses as much as digits as its factorization.

21937105339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 43.

The spelling of 21937105339 in words is "twenty-one billion, nine hundred thirty-seven million, one hundred five thousand, three hundred thirty-nine".