21441064305 has 32 divisors (see below), whose sum is σ = 35549539200. Its totient is φ = 11021975552.

The previous prime is 21441064289. The next prime is 21441064321. The reversal of 21441064305 is 50346014412.

It is an interprime number because it is at equal distance from previous prime (21441064289) and next prime (21441064321).

It is a cyclic number.

It is not a de Polignac number, because 21441064305 - 2⁴ = 21441064289 is a prime.

It is a super-2 number, since 2×21441064305² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213361 + ... + 297329.

It is an arithmetic number, because the mean of its divisors is an integer number (1110923100).

Almost surely, 2^21441064305 is an apocalyptic number.

It is an amenable number.

21441064305 is a deficient number, since it is larger than the sum of its proper divisors (14108474895).

21441064305 is a wasteful number, since it uses less digits than its factorization.

21441064305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84593.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21441064305 its reverse (50346014412), we get a palindrome (71787078717).

The spelling of 21441064305 in words is "twenty-one billion, four hundred forty-one million, sixty-four thousand, three hundred five".