21331023104 has 36 divisors (see below), whose sum is σ = 42594006420. Its totient is φ = 10661683200.

The previous prime is 21331023079. The next prime is 21331023127. The reversal of 21331023104 is 40132013312.

It can be written as a sum of positive squares in 2 ways, for example, as 5264953600 + 16066069504 = 72560^2 + 126752^2 .

It is a congruent number.

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, 782504 + ... + 809304.

It is an arithmetic number, because the mean of its divisors is an integer number (1183166845).

Almost surely, 2^21331023104 is an apocalyptic number.

It is an amenable number.

21331023104 is a deficient number, since it is larger than the sum of its proper divisors (21262983316).

21331023104 is an equidigital number, since it uses as much as digits as its factorization.

21331023104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29926 (or 29912 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21331023104 its reverse (40132013312), we get a palindrome (61463036416).

The spelling of 21331023104 in words is "twenty-one billion, three hundred thirty-one million, twenty-three thousand, one hundred four".