20002004 has 24 divisors (see below), whose sum is σ = 38652768. Its totient is φ = 8980640.

The previous prime is 20001983. The next prime is 20002007. The reversal of 20002004 is 40020002.

It is a junction number, because it is equal to n+sod(n) for n = 20001982 and 20002000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002007) 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, 914 + ... + 6390.

It is an arithmetic number, because the mean of its divisors is an integer number (1610532).

Almost surely, 2^20002004 is an apocalyptic number.

It is an amenable number.

20002004 is a deficient number, since it is larger than the sum of its proper divisors (18650764).

20002004 is a wasteful number, since it uses less digits than its factorization.

20002004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575 (or 5573 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 20002004 is about 4472.3600033987. The cubic root of 20002004 is about 271.4508275115.

Adding to 20002004 its reverse (40020002), we get a palindrome (60022006).

It can be divided in two parts, 2000 and 2004, that added together give a palindrome (4004).

The spelling of 20002004 in words is "twenty million, two thousand, four".