18006208002 has 72 divisors (see below), whose sum is σ = 43624822800. Its totient is φ = 5351660928.

The previous prime is 18006208001. The next prime is 18006208009. The reversal of 18006208002 is 20080260081.

It is a super-2 number, since 2×18006208002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18006208001) 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, 7749 + ... + 189927.

Almost surely, 2^18006208002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18006208002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21812411400).

18006208002 is an abundant number, since it is smaller than the sum of its proper divisors (25618614798).

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

18006208002 is a wasteful number, since it uses less digits than its factorization.

18006208002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182240 (or 182220 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 18006208002 its reverse (20080260081), we get a palindrome (38086468083).

The spelling of 18006208002 in words is "eighteen billion, six million, two hundred eight thousand, two".