21304214445 has 48 divisors (see below), whose sum is σ = 36453916800. Its totient is φ = 10621787136.

The previous prime is 21304214431. The next prime is 21304214447. The reversal of 21304214445 is 54441240312.

It is not a de Polignac number, because 21304214445 - 2⁴ = 21304214429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304214447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 629424 + ... + 662406.

It is an arithmetic number, because the mean of its divisors is an integer number (759456600).

Almost surely, 2^21304214445 is an apocalyptic number.

It is an amenable number.

21304214445 is a deficient number, since it is larger than the sum of its proper divisors (15149702355).

21304214445 is a wasteful number, since it uses less digits than its factorization.

21304214445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33174 (or 33157 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21304214445 its reverse (54441240312), we get a palindrome (75745454757).

The spelling of 21304214445 in words is "twenty-one billion, three hundred four million, two hundred fourteen thousand, four hundred forty-five".