12920542780 has 12 divisors (see below), whose sum is σ = 27133139880. Its totient is φ = 5168217104.

The previous prime is 12920542751. The next prime is 12920542781. The reversal of 12920542780 is 8724502921.

12920542780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12920542781) 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 3 ways as a sum of consecutive naturals, for example, 323013550 + ... + 323013589.

It is an arithmetic number, because the mean of its divisors is an integer number (2261094990).

Almost surely, 2^12920542780 is an apocalyptic number.

12920542780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12920542780 is an abundant number, since it is smaller than the sum of its proper divisors (14212597100).

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

12920542780 is a wasteful number, since it uses less digits than its factorization.

12920542780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646027148 (or 646027146 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 12920542780 in words is "twelve billion, nine hundred twenty million, five hundred forty-two thousand, seven hundred eighty".