20426504 has 16 divisors (see below), whose sum is σ = 43771200. Its totient is φ = 8754192.

The previous prime is 20426473. The next prime is 20426509. The reversal of 20426504 is 40562402.

It is a self number, because there is not a number n which added to its sum of digits gives 20426504.

It is not an unprimeable number, because it can be changed into a prime (20426509) 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, 182324 + ... + 182435.

It is an arithmetic number, because the mean of its divisors is an integer number (2735700).

Almost surely, 2^20426504 is an apocalyptic number.

It is an amenable number.

20426504 is an abundant number, since it is smaller than the sum of its proper divisors (23344696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20426504 is a wasteful number, since it uses less digits than its factorization.

20426504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364772 (or 364768 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20426504 is about 4519.5690060005. The cubic root of 20426504 is about 273.3577227229.

Adding to 20426504 its reverse (40562402), we get a palindrome (60988906).

The spelling of 20426504 in words is "twenty million, four hundred twenty-six thousand, five hundred four".