21140404204 has 6 divisors (see below), whose sum is σ = 36995707364. Its totient is φ = 10570202100.

The previous prime is 21140404193. The next prime is 21140404211. The reversal of 21140404204 is 40240404112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642550522 + ... + 2642550529.

Almost surely, 2^21140404204 is an apocalyptic number.

It is an amenable number.

21140404204 is a deficient number, since it is larger than the sum of its proper divisors (15855303160).

21140404204 is a wasteful number, since it uses less digits than its factorization.

21140404204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285101055 (or 5285101053 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21140404204 its reverse (40240404112), we get a palindrome (61380808316).

The spelling of 21140404204 in words is "twenty-one billion, one hundred forty million, four hundred four thousand, two hundred four".