12267857020 has 48 divisors (see below), whose sum is σ = 26232847200. Its totient is φ = 4817767680.

The previous prime is 12267856987. The next prime is 12267857027. The reversal of 12267857020 is 2075876221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12267857027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971950 + ... + 984490.

It is an arithmetic number, because the mean of its divisors is an integer number (546517650).

Almost surely, 2^12267857020 is an apocalyptic number.

12267857020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12267857020 is an abundant number, since it is smaller than the sum of its proper divisors (13964990180).

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

12267857020 is a wasteful number, since it uses less digits than its factorization.

12267857020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438 (or 13436 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 12267857020 in words is "twelve billion, two hundred sixty-seven million, eight hundred fifty-seven thousand, twenty".