12570021870 has 256 divisors, whose sum is σ = 38101155840. Its totient is φ = 2590511616.

The previous prime is 12570021829. The next prime is 12570021917. The reversal of 12570021870 is 7812007521.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6021967 + ... + 6024053.

It is an arithmetic number, because the mean of its divisors is an integer number (148832640).

Almost surely, 2^12570021870 is an apocalyptic number.

12570021870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12570021870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19050577920).

12570021870 is an abundant number, since it is smaller than the sum of its proper divisors (25531133970).

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

12570021870 is a wasteful number, since it uses less digits than its factorization.

12570021870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199.

The product of its (nonzero) digits is 7840, while the sum is 33.

The spelling of 12570021870 in words is "twelve billion, five hundred seventy million, twenty-one thousand, eight hundred seventy".