20013404 has 24 divisors (see below), whose sum is σ = 37403520. Its totient is φ = 9347184.

The previous prime is 20013391. The next prime is 20013407. The reversal of 20013404 is 40431002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013407) by changing a digit.

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, 1427 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (1558480).

Almost surely, 2^20013404 is an apocalyptic number.

It is an amenable number.

20013404 is a deficient number, since it is larger than the sum of its proper divisors (17390116).

20013404 is a wasteful number, since it uses less digits than its factorization.

20013404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129 (or 5127 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20013404 is about 4473.6343167496. The cubic root of 20013404 is about 271.5023882071.

Adding to 20013404 its reverse (40431002), we get a palindrome (60444406).

The spelling of 20013404 in words is "twenty million, thirteen thousand, four hundred four".