22720499 has 2 divisors, whose sum is σ = 22720500. Its totient is φ = 22720498.

The previous prime is 22720463. The next prime is 22720501. The reversal of 22720499 is 99402722.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22720499 is a prime.

Together with 22720501, 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 (22720459) 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, 11360249 + 11360250.

It is an arithmetic number, because the mean of its divisors is an integer number (11360250).

Almost surely, 2^22720499 is an apocalyptic number.

22720499 is a deficient number, since it is larger than the sum of its proper divisors (1).

22720499 is an equidigital number, since it uses as much as digits as its factorization.

22720499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 22720499 is about 4766.6024587750. The cubic root of 22720499 is about 283.2300235427.

The spelling of 22720499 in words is "twenty-two million, seven hundred twenty thousand, four hundred ninety-nine".