20016404 has 24 divisors (see below), whose sum is σ = 35925120. Its totient is φ = 9754784.

The previous prime is 20016397. The next prime is 20016413. The reversal of 20016404 is 40461002.

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 in 7 ways as a sum of consecutive naturals, for example, 55577 + ... + 55935.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^20016404 is an apocalyptic number.

It is an amenable number.

20016404 is a deficient number, since it is larger than the sum of its proper divisors (15908716).

20016404 is a wasteful number, since it uses less digits than its factorization.

20016404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20016404 is about 4473.9696020425. The cubic root of 20016404 is about 271.5159535568.

Adding to 20016404 its reverse (40461002), we get a palindrome (60477406).

The spelling of 20016404 in words is "twenty million, sixteen thousand, four hundred four".