12013830 has 48 divisors (see below), whose sum is σ = 32320080. Its totient is φ = 3092544.

The previous prime is 12013787. The next prime is 12013847. The reversal of 12013830 is 3831021.

It is a super-2 number, since 2×12013830² = 288664222537800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309 + ... + 4911.

It is an arithmetic number, because the mean of its divisors is an integer number (673335).

Almost surely, 2^12013830 is an apocalyptic number.

12013830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12013830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16160040).

12013830 is an abundant number, since it is smaller than the sum of its proper divisors (20306250).

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

12013830 is a wasteful number, since it uses less digits than its factorization.

12013830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645 (or 4642 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12013830 is about 3466.0972288728. The cubic root of 12013830 is about 229.0307669549.

Adding to 12013830 its reverse (3831021), we get a palindrome (15844851).

The spelling of 12013830 in words is "twelve million, thirteen thousand, eight hundred thirty".