12205820892 has 24 divisors (see below), whose sum is σ = 28487433856. Its totient is φ = 4067580528.

The previous prime is 12205820881. The next prime is 12205820897. The reversal of 12205820892 is 29802850221.

It is a self number, because there is not a number n which added to its sum of digits gives 12205820892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205820897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77968 + ... + 174615.

Almost surely, 2^12205820892 is an apocalyptic number.

12205820892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12205820892 is an abundant number, since it is smaller than the sum of its proper divisors (16281612964).

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

12205820892 is a wasteful number, since it uses less digits than its factorization.

12205820892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256617 (or 256615 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 12205820892 in words is "twelve billion, two hundred five million, eight hundred twenty thousand, eight hundred ninety-two".