21944119 has 2 divisors, whose sum is σ = 21944120. Its totient is φ = 21944118.

The previous prime is 21944113. The next prime is 21944123. The reversal of 21944119 is 91144912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21944119 - 2¹⁷ = 21813047 is a prime.

It is a super-2 number, since 2×21944119² = 963088717372322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21944113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10972059 + 10972060.

It is an arithmetic number, because the mean of its divisors is an integer number (10972060).

Almost surely, 2^21944119 is an apocalyptic number.

21944119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21944119 is an equidigital number, since it uses as much as digits as its factorization.

21944119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 21944119 is about 4684.4550376751. The cubic root of 21944119 is about 279.9664883363.

The spelling of 21944119 in words is "twenty-one million, nine hundred forty-four thousand, one hundred nineteen".