21950050849 has 2 divisors, whose sum is σ = 21950050850. Its totient is φ = 21950050848.

The previous prime is 21950050841. The next prime is 21950050853. The reversal of 21950050849 is 94805005912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16936419600 + 5013631249 = 130140^2 + 70807^2 .

It is a cyclic number.

It is not a de Polignac number, because 21950050849 - 2³ = 21950050841 is a prime.

It is not a weakly prime, because it can be changed into another prime (21950050841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10975025424 + 10975025425.

It is an arithmetic number, because the mean of its divisors is an integer number (10975025425).

Almost surely, 2^21950050849 is an apocalyptic number.

It is an amenable number.

21950050849 is a deficient number, since it is larger than the sum of its proper divisors (1).

21950050849 is an equidigital number, since it uses as much as digits as its factorization.

21950050849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 21950050849 in words is "twenty-one billion, nine hundred fifty million, fifty thousand, eight hundred forty-nine".