18816672006 has 72 divisors (see below), whose sum is σ = 45988851720. Its totient is φ = 5698661760.

The previous prime is 18816672001. The next prime is 18816672029. The reversal of 18816672006 is 60027661881.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18816672001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11087350 + ... + 11089046.

Almost surely, 2^18816672006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18816672006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22994425860).

18816672006 is an abundant number, since it is smaller than the sum of its proper divisors (27172179714).

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

18816672006 is an equidigital number, since it uses as much as digits as its factorization.

18816672006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 18816672006 in words is "eighteen billion, eight hundred sixteen million, six hundred seventy-two thousand, six".