21104341320 has 32 divisors (see below), whose sum is σ = 63313024320. Its totient is φ = 5627824320.

The previous prime is 21104341309. The next prime is 21104341327. The reversal of 21104341320 is 2314340112.

It is not an unprimeable number, because it can be changed into a prime (21104341327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87934636 + ... + 87934875.

It is an arithmetic number, because the mean of its divisors is an integer number (1978532010).

Almost surely, 2^21104341320 is an apocalyptic number.

21104341320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104341320 is an abundant number, since it is smaller than the sum of its proper divisors (42208683000).

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

21104341320 is a wasteful number, since it uses less digits than its factorization.

21104341320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175869525 (or 175869521 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21104341320 its reverse (2314340112), we get a palindrome (23418681432).

The spelling of 21104341320 in words is "twenty-one billion, one hundred four million, three hundred forty-one thousand, three hundred twenty".