20552404 has 6 divisors (see below), whose sum is σ = 35966714. Its totient is φ = 10276200.

The previous prime is 20552359. The next prime is 20552417. The reversal of 20552404 is 40425502.

It can be written as a sum of positive squares in only one way, i.e., 19342404 + 1210000 = 4398^2 + 1100^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2569047 + ... + 2569054.

Almost surely, 2^20552404 is an apocalyptic number.

It is an amenable number.

20552404 is a deficient number, since it is larger than the sum of its proper divisors (15414310).

20552404 is a wasteful number, since it uses less digits than its factorization.

20552404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138105 (or 5138103 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20552404 is about 4533.4759291299. The cubic root of 20552404 is about 273.9181917845.

Adding to 20552404 its reverse (40425502), we get a palindrome (60977906).

The spelling of 20552404 in words is "twenty million, five hundred fifty-two thousand, four hundred four".