12911045820 has 24 divisors (see below), whose sum is σ = 36150928464. Its totient is φ = 3442945536.

The previous prime is 12911045803. The next prime is 12911045821. The reversal of 12911045820 is 2854011921.

12911045820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12911045820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911045821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107591989 + ... + 107592108.

It is an arithmetic number, because the mean of its divisors is an integer number (1506288686).

Almost surely, 2^12911045820 is an apocalyptic number.

12911045820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12911045820 is an abundant number, since it is smaller than the sum of its proper divisors (23239882644).

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

12911045820 is a wasteful number, since it uses less digits than its factorization.

12911045820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215184109 (or 215184107 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 12911045820 in words is "twelve billion, nine hundred eleven million, forty-five thousand, eight hundred twenty".