12266236840 has 128 divisors (see below), whose sum is σ = 32620734720. Its totient is φ = 4092364800.

The previous prime is 12266236823. The next prime is 12266236849. The reversal of 12266236840 is 4863266221.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 12266236793 and 12266236802.

It is not an unprimeable number, because it can be changed into a prime (12266236849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 948820 + ... + 961660.

It is an arithmetic number, because the mean of its divisors is an integer number (254849490).

Almost surely, 2^12266236840 is an apocalyptic number.

12266236840 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 12266236840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16310367360).

12266236840 is an abundant number, since it is smaller than the sum of its proper divisors (20354497880).

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

12266236840 is a wasteful number, since it uses less digits than its factorization.

12266236840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043 (or 13039 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 12266236840 in words is "twelve billion, two hundred sixty-six million, two hundred thirty-six thousand, eight hundred forty".