24220809 has 8 divisors (see below), whose sum is σ = 35882720. Its totient is φ = 16147188.

The previous prime is 24220799. The next prime is 24220813. The reversal of 24220809 is 90802242.

It is a de Polignac number, because none of the positive numbers 2^k-24220809 is a prime.

It is a super-2 number, since 2×24220809² = 1173295177228962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 897067 = 24220809 / (2 + 4 + 2 + 2 + 0 + 8 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24221809) 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 in 7 ways as a sum of consecutive naturals, for example, 448507 + ... + 448560.

It is an arithmetic number, because the mean of its divisors is an integer number (4485340).

Almost surely, 2^24220809 is an apocalyptic number.

It is an amenable number.

24220809 is a deficient number, since it is larger than the sum of its proper divisors (11661911).

24220809 is an equidigital number, since it uses as much as digits as its factorization.

24220809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897076 (or 897070 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 24220809 is about 4921.4641114205. The cubic root of 24220809 is about 289.3318307040.

The spelling of 24220809 in words is "twenty-four million, two hundred twenty thousand, eight hundred nine".