20554404 has 24 divisors (see below), whose sum is σ = 51649920. Its totient is φ = 6324384.

The previous prime is 20554393. The next prime is 20554421. The reversal of 20554404 is 40445502.

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 7 ways as a sum of consecutive naturals, for example, 65724 + ... + 66035.

It is an arithmetic number, because the mean of its divisors is an integer number (2152080).

Almost surely, 2^20554404 is an apocalyptic number.

It is an amenable number.

20554404 is an abundant number, since it is smaller than the sum of its proper divisors (31095516).

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

20554404 is a wasteful number, since it uses less digits than its factorization.

20554404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131779 (or 131777 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20554404 is about 4533.6965050607. The cubic root of 20554404 is about 273.9270766918.

Adding to 20554404 its reverse (40445502), we get a palindrome (60999906).

The spelling of 20554404 in words is "twenty million, five hundred fifty-four thousand, four hundred four".