21441333233473 has 2 divisors, whose sum is σ = 21441333233474. Its totient is φ = 21441333233472.

The previous prime is 21441333233429. The next prime is 21441333233497. The reversal of 21441333233473 is 37433233314412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21390837750529 + 50495482944 = 4625023^2 + 224712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21441333233473 is a prime.

It is not a weakly prime, because it can be changed into another prime (21441333233423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720666616736 + 10720666616737.

It is an arithmetic number, because the mean of its divisors is an integer number (10720666616737).

Almost surely, 2^{21441333233473} is an apocalyptic number.

It is an amenable number.

21441333233473 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441333233473 is an equidigital number, since it uses as much as digits as its factorization.

21441333233473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 43.

Adding to 21441333233473 its reverse (37433233314412), we get a palindrome (58874566547885).

The spelling of 21441333233473 in words is "twenty-one trillion, four hundred forty-one billion, three hundred thirty-three million, two hundred thirty-three thousand, four hundred seventy-three".