12026721870 has 96 divisors (see below), whose sum is σ = 32592328704. Its totient is φ = 3073464000.

The previous prime is 12026721857. The next prime is 12026721877. The reversal of 12026721870 is 7812762021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12026721877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 266445 + ... + 308295.

It is an arithmetic number, because the mean of its divisors is an integer number (339503424).

Almost surely, 2^12026721870 is an apocalyptic number.

12026721870 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 12026721870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16296164352).

12026721870 is an abundant number, since it is smaller than the sum of its proper divisors (20565606834).

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

12026721870 is a wasteful number, since it uses less digits than its factorization.

12026721870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41998 (or 41995 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 12026721870 in words is "twelve billion, twenty-six million, seven hundred twenty-one thousand, eight hundred seventy".