20001404 has 12 divisors (see below), whose sum is σ = 35218344. Its totient is φ = 9939024.

The previous prime is 20001389. The next prime is 20001439. The reversal of 20001404 is 40410002.

20001404 is a modest number, since divided by 1404 gives 20 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14687 + ... + 15990.

It is an arithmetic number, because the mean of its divisors is an integer number (2934862).

Almost surely, 2^20001404 is an apocalyptic number.

It is an amenable number.

20001404 is a deficient number, since it is larger than the sum of its proper divisors (15216940).

20001404 is a wasteful number, since it uses less digits than its factorization.

20001404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30844 (or 30842 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20001404 is about 4472.2929242168. The cubic root of 20001404 is about 271.4481132481.

Adding to 20001404 its reverse (40410002), we get a palindrome (60411406).

The spelling of 20001404 in words is "twenty million, one thousand, four hundred four".