21936683239 has 2 divisors, whose sum is σ = 21936683240. Its totient is φ = 21936683238.

The previous prime is 21936683191. The next prime is 21936683257. The reversal of 21936683239 is 93238663912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21936683239 - 2⁹ = 21936682727 is a prime.

It is a super-2 number, since 2×21936683239² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21936689239) 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, 10968341619 + 10968341620.

It is an arithmetic number, because the mean of its divisors is an integer number (10968341620).

Almost surely, 2^21936683239 is an apocalyptic number.

21936683239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21936683239 is an equidigital number, since it uses as much as digits as its factorization.

21936683239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 52.

The spelling of 21936683239 in words is "twenty-one billion, nine hundred thirty-six million, six hundred eighty-three thousand, two hundred thirty-nine".