20824469 has 4 divisors (see below), whose sum is σ = 20851020. Its totient is φ = 20797920.

The previous prime is 20824459. The next prime is 20824477. The reversal of 20824469 is 96442802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16703569 + 4120900 = 4087^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 20824469 - 2⁸ = 20824213 is a prime.

It is a super-2 number, since 2×20824469² = 867317018263922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824429) 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 in 3 ways as a sum of consecutive naturals, for example, 12062 + ... + 13679.

It is an arithmetic number, because the mean of its divisors is an integer number (5212755).

Almost surely, 2^20824469 is an apocalyptic number.

It is an amenable number.

20824469 is a deficient number, since it is larger than the sum of its proper divisors (26551).

20824469 is an equidigital number, since it uses as much as digits as its factorization.

20824469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26550.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 20824469 is about 4563.3835034983. The cubic root of 20824469 is about 275.1215726932.

The spelling of 20824469 in words is "twenty million, eight hundred twenty-four thousand, four hundred sixty-nine".