21242104032 has 24 divisors (see below), whose sum is σ = 55760523336. Its totient is φ = 7080701312.

The previous prime is 21242104021. The next prime is 21242104049. The reversal of 21242104032 is 23040124212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110635863 + ... + 110636054.

It is an arithmetic number, because the mean of its divisors is an integer number (2323355139).

Almost surely, 2^21242104032 is an apocalyptic number.

It is an amenable number.

21242104032 is an abundant number, since it is smaller than the sum of its proper divisors (34518419304).

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

21242104032 is a wasteful number, since it uses less digits than its factorization.

21242104032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221271930 (or 221271922 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21242104032 its reverse (23040124212), we get a palindrome (44282228244).

The spelling of 21242104032 in words is "twenty-one billion, two hundred forty-two million, one hundred four thousand, thirty-two".