21333223039 has 2 divisors, whose sum is σ = 21333223040. Its totient is φ = 21333223038.

The previous prime is 21333223031. The next prime is 21333223057. The reversal of 21333223039 is 93032233312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21333223039 - 2³ = 21333223031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21333223039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21333223031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666611519 + 10666611520.

It is an arithmetic number, because the mean of its divisors is an integer number (10666611520).

Almost surely, 2^21333223039 is an apocalyptic number.

21333223039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333223039 is an equidigital number, since it uses as much as digits as its factorization.

21333223039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 31.

The spelling of 21333223039 in words is "twenty-one billion, three hundred thirty-three million, two hundred twenty-three thousand, thirty-nine".