12013920 has 168 divisors, whose sum is σ = 42968016. Its totient is φ = 3172608.

The previous prime is 12013919. The next prime is 12013931. The reversal of 12013920 is 2931021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12013893 and 12013902.

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 27 ways as a sum of consecutive naturals, for example, 116589 + ... + 116691.

It is an arithmetic number, because the mean of its divisors is an integer number (255762).

Almost surely, 2^12013920 is an apocalyptic number.

12013920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12013920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21484008).

12013920 is an abundant number, since it is smaller than the sum of its proper divisors (30954096).

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

12013920 is an equidigital number, since it uses as much as digits as its factorization.

12013920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12013920 is about 3466.1102117503. The cubic root of 12013920 is about 229.0313388713.

Adding to 12013920 its reverse (2931021), we get a palindrome (14944941).

The spelling of 12013920 in words is "twelve million, thirteen thousand, nine hundred twenty".