20901299 has 2 divisors, whose sum is σ = 20901300. Its totient is φ = 20901298.

The previous prime is 20901289. The next prime is 20901301. The reversal of 20901299 is 99210902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20901299 is a prime.

Together with 20901301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20901259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450649 + 10450650.

It is an arithmetic number, because the mean of its divisors is an integer number (10450650).

Almost surely, 2^20901299 is an apocalyptic number.

20901299 is a deficient number, since it is larger than the sum of its proper divisors (1).

20901299 is an equidigital number, since it uses as much as digits as its factorization.

20901299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 20901299 is about 4571.7938492456. The cubic root of 20901299 is about 275.4595028545.

The spelling of 20901299 in words is "twenty million, nine hundred one thousand, two hundred ninety-nine".