21827119 has 2 divisors, whose sum is σ = 21827120. Its totient is φ = 21827118.

The previous prime is 21827107. The next prime is 21827123. The reversal of 21827119 is 91172812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21827119 - 2¹¹ = 21825071 is a prime.

It is a super-2 number, since 2×21827119² = 952846247680322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21821119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10913559 + 10913560.

It is an arithmetic number, because the mean of its divisors is an integer number (10913560).

Almost surely, 2^21827119 is an apocalyptic number.

21827119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21827119 is an equidigital number, since it uses as much as digits as its factorization.

21827119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 21827119 is about 4671.9502351802. The cubic root of 21827119 is about 279.4680333341.

The spelling of 21827119 in words is "twenty-one million, eight hundred twenty-seven thousand, one hundred nineteen".