12945576820 has 48 divisors (see below), whose sum is σ = 29693418048. Its totient is φ = 4701724160.

The previous prime is 12945576817. The next prime is 12945576821. The reversal of 12945576820 is 2867554921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12945576821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146364 + ... + 217516.

It is an arithmetic number, because the mean of its divisors is an integer number (618612876).

Almost surely, 2^12945576820 is an apocalyptic number.

12945576820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12945576820 is an abundant number, since it is smaller than the sum of its proper divisors (16747841228).

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

12945576820 is a wasteful number, since it uses less digits than its factorization.

12945576820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72000 (or 71998 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 12945576820 in words is "twelve billion, nine hundred forty-five million, five hundred seventy-six thousand, eight hundred twenty".