12546211820 has 24 divisors (see below), whose sum is σ = 27896871744. Its totient is φ = 4723279616.

The previous prime is 12546211817. The next prime is 12546211823. The reversal of 12546211820 is 2811264521.

It is an interprime number because it is at equal distance from previous prime (12546211817) and next prime (12546211823).

It is not an unprimeable number, because it can be changed into a prime (12546211823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18449972 + ... + 18450651.

It is an arithmetic number, because the mean of its divisors is an integer number (1162369656).

Almost surely, 2^12546211820 is an apocalyptic number.

12546211820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12546211820 is an abundant number, since it is smaller than the sum of its proper divisors (15350659924).

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

12546211820 is a wasteful number, since it uses less digits than its factorization.

12546211820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36900649 (or 36900647 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 12546211820 in words is "twelve billion, five hundred forty-six million, two hundred eleven thousand, eight hundred twenty".