20000404 has 6 divisors (see below), whose sum is σ = 35000714. Its totient is φ = 10000200.

The previous prime is 20000389. The next prime is 20000429. The reversal of 20000404 is 40400002.

It can be written as a sum of positive squares in only one way, i.e., 10575504 + 9424900 = 3252^2 + 3070^2 .

It is a congruent 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 as a sum of consecutive naturals, namely, 2500047 + ... + 2500054.

Almost surely, 2^20000404 is an apocalyptic number.

It is an amenable number.

20000404 is a deficient number, since it is larger than the sum of its proper divisors (15000310).

20000404 is a wasteful number, since it uses less digits than its factorization.

20000404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000105 (or 5000103 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 20000404 is about 4472.1811233446. The cubic root of 20000404 is about 271.4435893550.

Adding to 20000404 its reverse (40400002), we get a palindrome (60400406).

The spelling of 20000404 in words is "twenty million, four hundred four", and thus it is an aban number.