11833181956 has 36 divisors (see below), whose sum is σ = 21729084300. Its totient is φ = 5638038208.

The previous prime is 11833181951. The next prime is 11833181981. The reversal of 11833181956 is 65918133811.

It can be written as a sum of positive squares in 2 ways, for example, as 5389909056 + 6443272900 = 73416^2 + 80270^2 .

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (11833181951) 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, 558810 + ... + 579598.

It is an arithmetic number, because the mean of its divisors is an integer number (603585675).

Almost surely, 2^11833181956 is an apocalyptic number.

It is an amenable number.

11833181956 is a deficient number, since it is larger than the sum of its proper divisors (9895902344).

11833181956 is a wasteful number, since it uses less digits than its factorization.

11833181956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21108 (or 21083 counting only the distinct ones).

The product of its digits is 155520, while the sum is 46.

The spelling of 11833181956 in words is "eleven billion, eight hundred thirty-three million, one hundred eighty-one thousand, nine hundred fifty-six".