181132836 has 12 divisors (see below), whose sum is σ = 422643312. Its totient is φ = 60377608.

The previous prime is 181132759. The next prime is 181132837. The reversal of 181132836 is 638231181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 181132797 and 181132806.

It is not an unprimeable number, because it can be changed into a prime (181132837) 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, 7547190 + ... + 7547213.

It is an arithmetic number, because the mean of its divisors is an integer number (35220276).

Almost surely, 2^181132836 is an apocalyptic number.

It is an amenable number.

181132836 is an abundant number, since it is smaller than the sum of its proper divisors (241510476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181132836 is a wasteful number, since it uses less digits than its factorization.

181132836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15094410 (or 15094408 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 181132836 is about 13458.5599526844. The cubic root of 181132836 is about 565.8036294313.

The spelling of 181132836 in words is "one hundred eighty-one million, one hundred thirty-two thousand, eight hundred thirty-six".