12918420 has 96 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 3364992.

The previous prime is 12918391. The next prime is 12918421. The reversal of 12918420 is 2481921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918421) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 25126 + ... + 25634.

It is an arithmetic number, because the mean of its divisors is an integer number (428400).

Almost surely, 2^12918420 is an apocalyptic number.

12918420 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 12918420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20563200).

12918420 is an abundant number, since it is smaller than the sum of its proper divisors (28207980).

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

12918420 is a wasteful number, since it uses less digits than its factorization.

12918420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12918420 is about 3594.2203605233. The cubic root of 12918420 is about 234.6405853346.

The spelling of 12918420 in words is "twelve million, nine hundred eighteen thousand, four hundred twenty".