12484691820 has 72 divisors (see below), whose sum is σ = 38168492544. Its totient is φ = 3303030528.

The previous prime is 12484691809. The next prime is 12484691837. The reversal of 12484691820 is 2819648421.

12484691820 is a `hidden beast` number, since 1 + 2 + 4 + 8 + 469 + 182 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250209 + ... + 295928.

It is an arithmetic number, because the mean of its divisors is an integer number (530117952).

Almost surely, 2^12484691820 is an apocalyptic number.

12484691820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12484691820 is an abundant number, since it is smaller than the sum of its proper divisors (25683800724).

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

12484691820 is a wasteful number, since it uses less digits than its factorization.

12484691820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546279 (or 546274 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 12484691820 in words is "twelve billion, four hundred eighty-four million, six hundred ninety-one thousand, eight hundred twenty".