20522404 has 12 divisors (see below), whose sum is σ = 41044864. Its totient is φ = 8795304.

The previous prime is 20522363. The next prime is 20522419. The reversal of 20522404 is 40422502.

20522404 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 366444 + ... + 366499.

Almost surely, 2^20522404 is an apocalyptic number.

It is an amenable number.

20522404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20522404 is a wasteful number, since it uses less digits than its factorization.

20522404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732954 (or 732952 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20522404 is about 4530.1660013735. The cubic root of 20522404 is about 273.7848489513.

Adding to 20522404 its reverse (40422502), we get a palindrome (60944906).

The spelling of 20522404 in words is "twenty million, five hundred twenty-two thousand, four hundred four".