21304100404 has 12 divisors (see below), whose sum is σ = 38075413824. Its totient is φ = 10425410744.

The previous prime is 21304100393. The next prime is 21304100413. The reversal of 21304100404 is 40400140312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56659654 + ... + 56660029.

It is an arithmetic number, because the mean of its divisors is an integer number (3172951152).

Almost surely, 2^21304100404 is an apocalyptic number.

It is an amenable number.

21304100404 is a deficient number, since it is larger than the sum of its proper divisors (16771313420).

21304100404 is a wasteful number, since it uses less digits than its factorization.

21304100404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113319734 (or 113319732 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21304100404 its reverse (40400140312), we get a palindrome (61704240716).

The spelling of 21304100404 in words is "twenty-one billion, three hundred four million, one hundred thousand, four hundred four".