21324444104 has 16 divisors (see below), whose sum is σ = 40661017200. Its totient is φ = 10481506192.

The previous prime is 21324444103. The next prime is 21324444131. The reversal of 21324444104 is 40144442312.

It is not an unprimeable number, because it can be changed into a prime (21324444101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22588982 + ... + 22589925.

It is an arithmetic number, because the mean of its divisors is an integer number (2541313575).

Almost surely, 2^21324444104 is an apocalyptic number.

It is an amenable number.

21324444104 is a deficient number, since it is larger than the sum of its proper divisors (19336573096).

21324444104 is a wasteful number, since it uses less digits than its factorization.

21324444104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45178972 (or 45178968 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21324444104 its reverse (40144442312), we get a palindrome (61468886416).

The spelling of 21324444104 in words is "twenty-one billion, three hundred twenty-four million, four hundred forty-four thousand, one hundred four".