18117949680012 has 192 divisors, whose sum is σ = 56249769927680. Its totient is φ = 4404519742464.

The previous prime is 18117949679899. The next prime is 18117949680013. The reversal of 18117949680012 is 21008694971181.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (18117949680013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11032843 + ... + 12568194.

Almost surely, 2^{18117949680012} is an apocalyptic number.

18117949680012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18117949680012 is an abundant number, since it is smaller than the sum of its proper divisors (38131820247668).

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

18117949680012 is a wasteful number, since it uses less digits than its factorization.

18117949680012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23601120 (or 23601118 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 57.

The spelling of 18117949680012 in words is "eighteen trillion, one hundred seventeen billion, nine hundred forty-nine million, six hundred eighty thousand, twelve".