181013823 has 12 divisors (see below), whose sum is σ = 261690000. Its totient is φ = 120571776.

The previous prime is 181013813. The next prime is 181013827. The reversal of 181013823 is 328310181.

It is not a de Polignac number, because 181013823 - 2¹³ = 181005631 is a prime.

It is a super-4 number, since 4×181013823⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181013827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3190 + ... + 19292.

It is an arithmetic number, because the mean of its divisors is an integer number (21807500).

Almost surely, 2^181013823 is an apocalyptic number.

181013823 is a deficient number, since it is larger than the sum of its proper divisors (80676177).

181013823 is a wasteful number, since it uses less digits than its factorization.

181013823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17358 (or 17355 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 181013823 is about 13454.1377650149. The cubic root of 181013823 is about 565.6796821995.

The spelling of 181013823 in words is "one hundred eighty-one million, thirteen thousand, eight hundred twenty-three".