20104004 has 6 divisors (see below), whose sum is σ = 35182014. Its totient is φ = 10052000.

The previous prime is 20104003. The next prime is 20104031. The reversal of 20104004 is 40040102.

It can be written as a sum of positive squares in only one way, i.e., 12264004 + 7840000 = 3502^2 + 2800^2 .

It is not an unprimeable number, because it can be changed into a prime (20104003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512997 + ... + 2513004.

It is an arithmetic number, because the mean of its divisors is an integer number (5863669).

Almost surely, 2^20104004 is an apocalyptic number.

It is an amenable number.

20104004 is a deficient number, since it is larger than the sum of its proper divisors (15078010).

20104004 is a wasteful number, since it uses less digits than its factorization.

20104004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026005 (or 5026003 counting only the distinct ones).

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

The square root of 20104004 is about 4483.7488778922. The cubic root of 20104004 is about 271.9114655628.

Adding to 20104004 its reverse (40040102), we get a palindrome (60144106).

The spelling of 20104004 in words is "twenty million, one hundred four thousand, four".