12499922520 has 192 divisors, whose sum is σ = 43161037920. Its totient is φ = 3126546432.

The previous prime is 12499922507. The next prime is 12499922551. The reversal of 12499922520 is 2522999421.

It is a happy number.

12499922520 is a `hidden beast` number, since 12 + 4 + 9 + 99 + 22 + 520 = 666.

12499922520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1875514 + ... + 1882166.

Almost surely, 2^12499922520 is an apocalyptic number.

12499922520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12499922520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21580518960).

12499922520 is an abundant number, since it is smaller than the sum of its proper divisors (30661115400).

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

12499922520 is a wasteful number, since it uses less digits than its factorization.

12499922520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994 (or 6987 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 12499922520 in words is "twelve billion, four hundred ninety-nine million, nine hundred twenty-two thousand, five hundred twenty".