21903033241 has 2 divisors, whose sum is σ = 21903033242. Its totient is φ = 21903033240.

The previous prime is 21903033211. The next prime is 21903033247. The reversal of 21903033241 is 14233030912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21162975625 + 740057616 = 145475^2 + 27204^2 .

It is a cyclic number.

It is not a de Polignac number, because 21903033241 - 2²⁷ = 21768815513 is a prime.

It is not a weakly prime, because it can be changed into another prime (21903033247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10951516620 + 10951516621.

It is an arithmetic number, because the mean of its divisors is an integer number (10951516621).

Almost surely, 2^21903033241 is an apocalyptic number.

It is an amenable number.

21903033241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21903033241 is an equidigital number, since it uses as much as digits as its factorization.

21903033241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21903033241 in words is "twenty-one billion, nine hundred three million, thirty-three thousand, two hundred forty-one".