1218131832 has 16 divisors (see below), whose sum is σ = 3045329640. Its totient is φ = 406043936.

The previous prime is 1218131813. The next prime is 1218131839. The reversal of 1218131832 is 2381318121.

1218131832 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1218131832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218131839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25377723 + ... + 25377770.

Almost surely, 2^1218131832 is an apocalyptic number.

1218131832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218131832 is an abundant number, since it is smaller than the sum of its proper divisors (1827197808).

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

1218131832 is a wasteful number, since it uses less digits than its factorization.

1218131832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50755502 (or 50755498 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 1218131832 is about 34901.7454004810. The cubic root of 1218131832 is about 1067.9840435832.

Adding to 1218131832 its reverse (2381318121), we get a palindrome (3599449953).

The spelling of 1218131832 in words is "one billion, two hundred eighteen million, one hundred thirty-one thousand, eight hundred thirty-two".