18814359173 has 2 divisors, whose sum is σ = 18814359174. Its totient is φ = 18814359172.

The previous prime is 18814359167. The next prime is 18814359197. The reversal of 18814359173 is 37195341881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13577376484 + 5236982689 = 116522^2 + 72367^2 .

It is a cyclic number.

It is not a de Polignac number, because 18814359173 - 2¹⁶ = 18814293637 is a prime.

It is a super-2 number, since 2×18814359173² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18814359103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407179586 + 9407179587.

It is an arithmetic number, because the mean of its divisors is an integer number (9407179587).

Almost surely, 2^18814359173 is an apocalyptic number.

It is an amenable number.

18814359173 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814359173 is an equidigital number, since it uses as much as digits as its factorization.

18814359173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The spelling of 18814359173 in words is "eighteen billion, eight hundred fourteen million, three hundred fifty-nine thousand, one hundred seventy-three".