21073576441 has 2 divisors, whose sum is σ = 21073576442. Its totient is φ = 21073576440.

The previous prime is 21073576427. The next prime is 21073576481. The reversal of 21073576441 is 14467537012.

It is an a-pointer prime, because the next prime (21073576481) can be obtained adding 21073576441 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16615210000 + 4458366441 = 128900^2 + 66771^2 .

It is a cyclic number.

It is not a de Polignac number, because 21073576441 - 2⁷ = 21073576313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21073576394 and 21073576403.

It is not a weakly prime, because it can be changed into another prime (21073576411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536788220 + 10536788221.

It is an arithmetic number, because the mean of its divisors is an integer number (10536788221).

Almost surely, 2^21073576441 is an apocalyptic number.

It is an amenable number.

21073576441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073576441 is an equidigital number, since it uses as much as digits as its factorization.

21073576441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 21073576441 in words is "twenty-one billion, seventy-three million, five hundred seventy-six thousand, four hundred forty-one".