12189243870 has 48 divisors (see below), whose sum is σ = 32211590112. Its totient is φ = 3197177280.

The previous prime is 12189243863. The next prime is 12189243881. The reversal of 12189243870 is 7834298121.

It is a happy number.

12189243870 is a `hidden beast` number, since 121 + 8 + 92 + 438 + 7 + 0 = 666.

It is a super-2 number, since 2×12189243870² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1104642 + ... + 1115621.

It is an arithmetic number, because the mean of its divisors is an integer number (671074794).

Almost surely, 2^12189243870 is an apocalyptic number.

12189243870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12189243870 is an abundant number, since it is smaller than the sum of its proper divisors (20022346242).

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

12189243870 is a wasteful number, since it uses less digits than its factorization.

12189243870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220337 (or 2220334 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 12189243870 in words is "twelve billion, one hundred eighty-nine million, two hundred forty-three thousand, eight hundred seventy".