1836161236 has 48 divisors (see below), whose sum is σ = 3977043840. Its totient is φ = 722309760.

The previous prime is 1836161221. The next prime is 1836161281. The reversal of 1836161236 is 6321616381.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1836161195 and 1836161204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51066 + ... + 79246.

It is an arithmetic number, because the mean of its divisors is an integer number (82855080).

Almost surely, 2^1836161236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1836161236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988521920).

1836161236 is an abundant number, since it is smaller than the sum of its proper divisors (2140882604).

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

1836161236 is a wasteful number, since it uses less digits than its factorization.

1836161236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28384 (or 28382 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 1836161236 is about 42850.4519929487. The cubic root of 1836161236 is about 1224.5323742832.

It can be divided in two parts, 18361 and 61236, that added together give a palindrome (79597).

The spelling of 1836161236 in words is "one billion, eight hundred thirty-six million, one hundred sixty-one thousand, two hundred thirty-six".