11811812 has 6 divisors (see below), whose sum is σ = 20670678. Its totient is φ = 5905904.

The previous prime is 11811797. The next prime is 11811847. The reversal of 11811812 is 21811811.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 5134756 = 2584^2 + 2266^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1476473 + ... + 1476480.

It is an arithmetic number, because the mean of its divisors is an integer number (3445113).

Almost surely, 2^11811812 is an apocalyptic number.

It is an amenable number.

11811812 is a deficient number, since it is larger than the sum of its proper divisors (8858866).

11811812 is a wasteful number, since it uses less digits than its factorization.

11811812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952957 (or 2952955 counting only the distinct ones).

The product of its digits is 128, while the sum is 23.

The square root of 11811812 is about 3436.8316804871. The cubic root of 11811812 is about 227.7397512742.

Subtracting 11811812 from its reverse (21811811), we obtain a palindrome (9999999).

The spelling of 11811812 in words is "eleven million, eight hundred eleven thousand, eight hundred twelve".