12055518 has 24 divisors (see below), whose sum is σ = 26355888. Its totient is φ = 3982272.

The previous prime is 12055513. The next prime is 12055531. The reversal of 12055518 is 81555021.

It is a junction number, because it is equal to n+sod(n) for n = 12055491 and 12055500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12055513) 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, 930 + ... + 4997.

It is an arithmetic number, because the mean of its divisors is an integer number (1098162).

Almost surely, 2^12055518 is an apocalyptic number.

12055518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12055518 is an abundant number, since it is smaller than the sum of its proper divisors (14300370).

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

12055518 is a wasteful number, since it uses less digits than its factorization.

12055518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048 (or 6045 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 12055518 is about 3472.1057011560. The cubic root of 12055518 is about 229.2953734457.

The spelling of 12055518 in words is "twelve million, fifty-five thousand, five hundred eighteen".