18131245830 has 48 divisors (see below), whose sum is σ = 47208651984. Its totient is φ = 4828084800.

The previous prime is 18131245829. The next prime is 18131245837. The reversal of 18131245830 is 3854213181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18131245837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80604 + ... + 206783.

It is an arithmetic number, because the mean of its divisors is an integer number (983513583).

Almost surely, 2^18131245830 is an apocalyptic number.

18131245830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18131245830 is an abundant number, since it is smaller than the sum of its proper divisors (29077406154).

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

18131245830 is a wasteful number, since it uses less digits than its factorization.

18131245830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288101 (or 288098 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 18131245830 in words is "eighteen billion, one hundred thirty-one million, two hundred forty-five thousand, eight hundred thirty".