18102478016 has 112 divisors (see below), whose sum is σ = 43525440000. Its totient is φ = 7292325888.

The previous prime is 18102477997. The next prime is 18102478021. The reversal of 18102478016 is 61087420181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10653935 + ... + 10655633.

It is an arithmetic number, because the mean of its divisors is an integer number (388620000).

Almost surely, 2^18102478016 is an apocalyptic number.

18102478016 is a gapful number since it is divisible by the number (16) 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 18102478016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21762720000).

18102478016 is an abundant number, since it is smaller than the sum of its proper divisors (25422961984).

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

18102478016 is a wasteful number, since it uses less digits than its factorization.

18102478016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134 (or 3124 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

Adding to 18102478016 its reverse (61087420181), we get a palindrome (79189898197).

The spelling of 18102478016 in words is "eighteen billion, one hundred two million, four hundred seventy-eight thousand, sixteen".