20015404 has 12 divisors (see below), whose sum is σ = 35060200. Its totient is φ = 9998208.

The previous prime is 20015393. The next prime is 20015419. The reversal of 20015404 is 40451002.

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, 4732 + ... + 7900.

Almost surely, 2^20015404 is an apocalyptic number.

It is an amenable number.

20015404 is a deficient number, since it is larger than the sum of its proper divisors (15044796).

20015404 is a wasteful number, since it uses less digits than its factorization.

20015404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752 (or 4750 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20015404 is about 4473.8578430701. The cubic root of 20015404 is about 271.5114319241.

Adding to 20015404 its reverse (40451002), we get a palindrome (60466406).

The spelling of 20015404 in words is "twenty million, fifteen thousand, four hundred four".