20004812 has 6 divisors (see below), whose sum is σ = 35008428. Its totient is φ = 10002404.

The previous prime is 20004811. The next prime is 20004821. The reversal of 20004812 is 21840002.

It is not an unprimeable number, because it can be changed into a prime (20004811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500598 + ... + 2500605.

It is an arithmetic number, because the mean of its divisors is an integer number (5834738).

Almost surely, 2^20004812 is an apocalyptic number.

It is an amenable number.

20004812 is a deficient number, since it is larger than the sum of its proper divisors (15003616).

20004812 is a wasteful number, since it uses less digits than its factorization.

20004812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001207 (or 5001205 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20004812 is about 4472.6739205983. The cubic root of 20004812 is about 271.4635295431.

Adding to 20004812 its reverse (21840002), we get a palindrome (41844814).

The spelling of 20004812 in words is "twenty million, four thousand, eight hundred twelve".