21004100204 has 12 divisors (see below), whose sum is σ = 38355313584. Its totient is φ = 10045439184.

The previous prime is 21004100197. The next prime is 21004100213. The reversal of 21004100204 is 40200140012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114152627 + ... + 114152810.

It is an arithmetic number, because the mean of its divisors is an integer number (3196276132).

Almost surely, 2^21004100204 is an apocalyptic number.

It is an amenable number.

21004100204 is a deficient number, since it is larger than the sum of its proper divisors (17351213380).

21004100204 is a wasteful number, since it uses less digits than its factorization.

21004100204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228305464 (or 228305462 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21004100204 its reverse (40200140012), we get a palindrome (61204240216).

The spelling of 21004100204 in words is "twenty-one billion, four million, one hundred thousand, two hundred four".