20244691 has 2 divisors, whose sum is σ = 20244692. Its totient is φ = 20244690.

The previous prime is 20244683. The next prime is 20244713. The reversal of 20244691 is 19644202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20244691 - 2³ = 20244683 is a prime.

It is not a weakly prime, because it can be changed into another prime (20244641) 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, 10122345 + 10122346.

It is an arithmetic number, because the mean of its divisors is an integer number (10122346).

Almost surely, 2^20244691 is an apocalyptic number.

20244691 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244691 is an equidigital number, since it uses as much as digits as its factorization.

20244691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20244691 is about 4499.4100724428. The cubic root of 20244691 is about 272.5442668596.

Adding to 20244691 its reverse (19644202), we get a palindrome (39888893).

The spelling of 20244691 in words is "twenty million, two hundred forty-four thousand, six hundred ninety-one".