21562045339 has 2 divisors, whose sum is σ = 21562045340. Its totient is φ = 21562045338.

The previous prime is 21562045277. The next prime is 21562045369. The reversal of 21562045339 is 93354026512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21562045339 - 2²¹ = 21559948187 is a prime.

It is not a weakly prime, because it can be changed into another prime (21562045369) 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, 10781022669 + 10781022670.

It is an arithmetic number, because the mean of its divisors is an integer number (10781022670).

Almost surely, 2^21562045339 is an apocalyptic number.

21562045339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21562045339 is an equidigital number, since it uses as much as digits as its factorization.

21562045339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 21562045339 in words is "twenty-one billion, five hundred sixty-two million, forty-five thousand, three hundred thirty-nine".