11820634173 has 6 divisors (see below), whose sum is σ = 17074249374. Its totient is φ = 7880422776.

The previous prime is 11820634171. The next prime is 11820634183. The reversal of 11820634173 is 37143602811.

It is a happy number.

11820634173 is a `hidden beast` number, since 1 + 1 + 8 + 2 + 0 + 634 + 17 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11771816004 + 48818169 = 108498^2 + 6987^2 .

It is not a de Polignac number, because 11820634173 - 2¹ = 11820634171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11820634171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656701890 + ... + 656701907.

It is an arithmetic number, because the mean of its divisors is an integer number (2845708229).

Almost surely, 2^11820634173 is an apocalyptic number.

It is an amenable number.

11820634173 is a deficient number, since it is larger than the sum of its proper divisors (5253615201).

11820634173 is a wasteful number, since it uses less digits than its factorization.

11820634173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313403803 (or 1313403800 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 11820634173 in words is "eleven billion, eight hundred twenty million, six hundred thirty-four thousand, one hundred seventy-three".