21826141 has 2 divisors, whose sum is σ = 21826142. Its totient is φ = 21826140.

The previous prime is 21826127. The next prime is 21826151. The reversal of 21826141 is 14162812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 2059225 = 4446^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 21826141 - 2⁵ = 21826109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21826151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10913070 + 10913071.

It is an arithmetic number, because the mean of its divisors is an integer number (10913071).

Almost surely, 2^21826141 is an apocalyptic number.

It is an amenable number.

21826141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21826141 is an equidigital number, since it uses as much as digits as its factorization.

21826141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 21826141 is about 4671.8455667969. The cubic root of 21826141 is about 279.4638592633.

Adding to 21826141 its reverse (14162812), we get a palindrome (35988953).

The spelling of 21826141 in words is "twenty-one million, eight hundred twenty-six thousand, one hundred forty-one".