12919820 has 24 divisors (see below), whose sum is σ = 27594000. Its totient is φ = 5079872.

The previous prime is 12919817. The next prime is 12919843. The reversal of 12919820 is 2891921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295 + ... + 6654.

It is an arithmetic number, because the mean of its divisors is an integer number (1149750).

Almost surely, 2^12919820 is an apocalyptic number.

12919820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12919820 is an abundant number, since it is smaller than the sum of its proper divisors (14674180).

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

12919820 is a wasteful number, since it uses less digits than its factorization.

12919820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11017 (or 11015 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 12919820 is about 3594.4151123653. The cubic root of 12919820 is about 234.6490612151.

It can be divided in two parts, 1291 and 9820, that added together give a palindrome (11111).

The spelling of 12919820 in words is "twelve million, nine hundred nineteen thousand, eight hundred twenty".