18180078336 has 216 divisors, whose sum is σ = 60528677664. Its totient is φ = 5140316160.

The previous prime is 18180078283. The next prime is 18180078359. The reversal of 18180078336 is 63387008181.

It is a junction number, because it is equal to n+sod(n) for n = 18180078291 and 18180078300.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1558606 + ... + 1570226.

Almost surely, 2^18180078336 is an apocalyptic number.

18180078336 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 18180078336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30264338832).

18180078336 is an abundant number, since it is smaller than the sum of its proper divisors (42348599328).

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

18180078336 is a wasteful number, since it uses less digits than its factorization.

18180078336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11747 (or 11730 counting only the distinct ones).

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

The spelling of 18180078336 in words is "eighteen billion, one hundred eighty million, seventy-eight thousand, three hundred thirty-six".