20244491 has 2 divisors, whose sum is σ = 20244492. Its totient is φ = 20244490.

The previous prime is 20244479. The next prime is 20244503. The reversal of 20244491 is 19444202.

It is a balanced prime because it is at equal distance from previous prime (20244479) and next prime (20244503).

It is a cyclic number.

It is not a de Polignac number, because 20244491 - 2¹⁰ = 20243467 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20244491.

It is not a weakly prime, because it can be changed into another prime (20244431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122245 + 10122246.

It is an arithmetic number, because the mean of its divisors is an integer number (10122246).

Almost surely, 2^20244491 is an apocalyptic number.

20244491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244491 is an equidigital number, since it uses as much as digits as its factorization.

20244491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20244491 is about 4499.3878472521. The cubic root of 20244491 is about 272.5433693563.

Adding to 20244491 its reverse (19444202), we get a palindrome (39688693).

The spelling of 20244491 in words is "twenty million, two hundred forty-four thousand, four hundred ninety-one".