21002104304 has 20 divisors (see below), whose sum is σ = 41064897720. Its totient is φ = 10404711360.

The previous prime is 21002104303. The next prime is 21002104313. The reversal of 21002104304 is 40340120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002104303) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6019502 + ... + 6022989.

It is an arithmetic number, because the mean of its divisors is an integer number (2053244886).

Almost surely, 2^21002104304 is an apocalyptic number.

It is an amenable number.

21002104304 is a deficient number, since it is larger than the sum of its proper divisors (20062793416).

21002104304 is a wasteful number, since it uses less digits than its factorization.

21002104304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12042608 (or 12042602 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21002104304 its reverse (40340120012), we get a palindrome (61342224316).

The spelling of 21002104304 in words is "twenty-one billion, two million, one hundred four thousand, three hundred four".