10645442005021 has 4 divisors (see below), whose sum is σ = 10649242594044. Its totient is φ = 10641641416000.

The previous prime is 10645442004959. The next prime is 10645442005049. The reversal of 10645442005021 is 12050024454601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3421501072900 + 7223940932121 = 1849730^2 + 2687739^2 .

It is a cyclic number.

It is not a de Polignac number, because 10645442005021 - 2²⁹ = 10644905134109 is a prime.

It is a super-2 number, since 2×10645442005021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10645442005091) 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, 1900290310 + ... + 1900295911.

It is an arithmetic number, because the mean of its divisors is an integer number (2662310648511).

Almost surely, 2^{10645442005021} is an apocalyptic number.

It is an amenable number.

10645442005021 is a deficient number, since it is larger than the sum of its proper divisors (3800589023).

10645442005021 is an equidigital number, since it uses as much as digits as its factorization.

10645442005021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800589022.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 10645442005021 its reverse (12050024454601), we get a palindrome (22695466459622).

The spelling of 10645442005021 in words is "ten trillion, six hundred forty-five billion, four hundred forty-two million, five thousand, twenty-one".