20004224004 has 18 divisors (see below), whose sum is σ = 50566232990. Its totient is φ = 6668074656.

The previous prime is 20004223999. The next prime is 20004224027. The reversal of 20004224004 is 40042240002.

20004224004 is a `hidden beast` number, since 200 + 0 + 422 + 40 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11416495104 + 8587728900 = 106848^2 + 92670^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277836409 + ... + 277836480.

Almost surely, 2^20004224004 is an apocalyptic number.

It is an amenable number.

20004224004 is an abundant number, since it is smaller than the sum of its proper divisors (30562008986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20004224004 is a wasteful number, since it uses less digits than its factorization.

20004224004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555672899 (or 555672894 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20004224004 its reverse (40042240002), we get a palindrome (60046464006).

The spelling of 20004224004 in words is "twenty billion, four million, two hundred twenty-four thousand, four".