10420421173 has 4 divisors (see below), whose sum is σ = 10458040300. Its totient is φ = 10382802048.

The previous prime is 10420421171. The next prime is 10420421191. The reversal of 10420421173 is 37112402401.

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 2621235204 + 7799185969 = 51198^2 + 88313^2 .

It is a cyclic number.

It is not a de Polignac number, because 10420421173 - 2¹ = 10420421171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10420421171) 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, 18809148 + ... + 18809701.

It is an arithmetic number, because the mean of its divisors is an integer number (2614510075).

Almost surely, 2^10420421173 is an apocalyptic number.

It is an amenable number.

10420421173 is a deficient number, since it is larger than the sum of its proper divisors (37619127).

10420421173 is an equidigital number, since it uses as much as digits as its factorization.

10420421173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37619126.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 10420421173 its reverse (37112402401), we get a palindrome (47532823574).

The spelling of 10420421173 in words is "ten billion, four hundred twenty million, four hundred twenty-one thousand, one hundred seventy-three".