22399399173 has 4 divisors (see below), whose sum is σ = 29865865568. Its totient is φ = 14932932780.

The previous prime is 22399399163. The next prime is 22399399199. The reversal of 22399399173 is 37199399322.

It is a happy number.

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 22399399173 - 2¹² = 22399395077 is a prime.

It is a super-2 number, since 2×22399399173² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22399399163) 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, 3733233193 + ... + 3733233198.

It is an arithmetic number, because the mean of its divisors is an integer number (7466466392).

Almost surely, 2^22399399173 is an apocalyptic number.

It is an amenable number.

22399399173 is a deficient number, since it is larger than the sum of its proper divisors (7466466395).

22399399173 is an equidigital number, since it uses as much as digits as its factorization.

22399399173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466466394.

The product of its digits is 4960116, while the sum is 57.

The spelling of 22399399173 in words is "twenty-two billion, three hundred ninety-nine million, three hundred ninety-nine thousand, one hundred seventy-three".