21104750959 has 2 divisors, whose sum is σ = 21104750960. Its totient is φ = 21104750958.

The previous prime is 21104750911. The next prime is 21104750969. The reversal of 21104750959 is 95905740112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21104750959 - 2⁷ = 21104750831 is a prime.

It is a super-2 number, since 2×21104750959² (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 (21104750969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552375479 + 10552375480.

It is an arithmetic number, because the mean of its divisors is an integer number (10552375480).

Almost surely, 2^21104750959 is an apocalyptic number.

21104750959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104750959 is an equidigital number, since it uses as much as digits as its factorization.

21104750959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 21104750959 in words is "twenty-one billion, one hundred four million, seven hundred fifty thousand, nine hundred fifty-nine".