20100404 has 24 divisors (see below), whose sum is σ = 37544640. Its totient is φ = 9388224.

The previous prime is 20100403. The next prime is 20100419. The reversal of 20100404 is 40400102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3737 + ... + 7359.

It is an arithmetic number, because the mean of its divisors is an integer number (1564360).

Almost surely, 2^20100404 is an apocalyptic number.

It is an amenable number.

20100404 is a deficient number, since it is larger than the sum of its proper divisors (17444236).

20100404 is a wasteful number, since it uses less digits than its factorization.

20100404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719 (or 3717 counting only the distinct ones).

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

The square root of 20100404 is about 4483.3474101390. The cubic root of 20100404 is about 271.8952343068.

Adding to 20100404 its reverse (40400102), we get a palindrome (60500506).

The spelling of 20100404 in words is "twenty million, one hundred thousand, four hundred four".