11820012 has 24 divisors (see below), whose sum is σ = 28222656. Its totient is φ = 3848208.

The previous prime is 11819993. The next prime is 11820019. The reversal of 11820012 is 21002811.

It is a junction number, because it is equal to n+sod(n) for n = 11819973 and 11820000.

It is not an unprimeable number, because it can be changed into a prime (11820019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10938 + ... + 11969.

It is an arithmetic number, because the mean of its divisors is an integer number (1175944).

Almost surely, 2^11820012 is an apocalyptic number.

11820012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11820012 is an abundant number, since it is smaller than the sum of its proper divisors (16402644).

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

11820012 is a wasteful number, since it uses less digits than its factorization.

11820012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22957 (or 22955 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 11820012 is about 3438.0244327230. The cubic root of 11820012 is about 227.7924396053.

Adding to 11820012 its reverse (21002811), we get a palindrome (32822823).

The spelling of 11820012 in words is "eleven million, eight hundred twenty thousand, twelve".