18867237012 has 240 divisors, whose sum is σ = 54505059840. Its totient is φ = 5655267072.

The previous prime is 18867236981. The next prime is 18867237017. The reversal of 18867237012 is 21073276881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867237017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 49781439 + ... + 49781817.

It is an arithmetic number, because the mean of its divisors is an integer number (227104416).

Almost surely, 2^18867237012 is an apocalyptic number.

18867237012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18867237012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27252529920).

18867237012 is an abundant number, since it is smaller than the sum of its proper divisors (35637822828).

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

18867237012 is a wasteful number, since it uses less digits than its factorization.

18867237012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 18867237012 in words is "eighteen billion, eight hundred sixty-seven million, two hundred thirty-seven thousand, twelve".