18665950992 has 80 divisors (see below), whose sum is σ = 52113622848. Its totient is φ = 5723020800.

The previous prime is 18665950973. The next prime is 18665950999. The reversal of 18665950992 is 29905956681.

It is not an unprimeable number, because it can be changed into a prime (18665950999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123742 + ... + 229442.

Almost surely, 2^18665950992 is an apocalyptic number.

18665950992 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 18665950992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26056811424).

18665950992 is an abundant number, since it is smaller than the sum of its proper divisors (33447671856).

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

18665950992 is a wasteful number, since it uses less digits than its factorization.

18665950992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106008 (or 106002 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 60.

The spelling of 18665950992 in words is "eighteen billion, six hundred sixty-five million, nine hundred fifty thousand, nine hundred ninety-two".