21790959241 has 2 divisors, whose sum is σ = 21790959242. Its totient is φ = 21790959240.

The previous prime is 21790959221. The next prime is 21790959293. The reversal of 21790959241 is 14295909712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21501823225 + 289136016 = 146635^2 + 17004^2 .

It is a cyclic number.

It is not a de Polignac number, because 21790959241 - 2²³ = 21782570633 is a prime.

It is not a weakly prime, because it can be changed into another prime (21790959221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10895479620 + 10895479621.

It is an arithmetic number, because the mean of its divisors is an integer number (10895479621).

Almost surely, 2^21790959241 is an apocalyptic number.

It is an amenable number.

21790959241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21790959241 is an equidigital number, since it uses as much as digits as its factorization.

21790959241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 21790959241 in words is "twenty-one billion, seven hundred ninety million, nine hundred fifty-nine thousand, two hundred forty-one".