21411613173 has 4 divisors (see below), whose sum is σ = 28548817568. Its totient is φ = 14274408780.

The previous prime is 21411613151. The next prime is 21411613211. The reversal of 21411613173 is 37131611412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21411613173 - 2⁶ = 21411613109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21411613173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411613273) 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, 3568602193 + ... + 3568602198.

It is an arithmetic number, because the mean of its divisors is an integer number (7137204392).

Almost surely, 2^21411613173 is an apocalyptic number.

It is an amenable number.

21411613173 is a deficient number, since it is larger than the sum of its proper divisors (7137204395).

21411613173 is an equidigital number, since it uses as much as digits as its factorization.

21411613173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137204394.

The product of its digits is 3024, while the sum is 30.

The spelling of 21411613173 in words is "twenty-one billion, four hundred eleven million, six hundred thirteen thousand, one hundred seventy-three".