12185430780 has 24 divisors (see below), whose sum is σ = 34119206352. Its totient is φ = 3249448192.

The previous prime is 12185430739. The next prime is 12185430781. The reversal of 12185430780 is 8703458121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185430781) 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, 101545197 + ... + 101545316.

It is an arithmetic number, because the mean of its divisors is an integer number (1421633598).

Almost surely, 2^12185430780 is an apocalyptic number.

12185430780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12185430780 is an abundant number, since it is smaller than the sum of its proper divisors (21933775572).

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

12185430780 is a wasteful number, since it uses less digits than its factorization.

12185430780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203090525 (or 203090523 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 12185430780 in words is "twelve billion, one hundred eighty-five million, four hundred thirty thousand, seven hundred eighty".