18059055636 has 48 divisors (see below), whose sum is σ = 44096822784. Its totient is φ = 5741335776.

The previous prime is 18059055559. The next prime is 18059055661. The reversal of 18059055636 is 63655095081.

It is a happy number.

It is a super-2 number, since 2×18059055636² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 1491 + ... + 190053.

It is an arithmetic number, because the mean of its divisors is an integer number (918683808).

Almost surely, 2^18059055636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18059055636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22048411392).

18059055636 is an abundant number, since it is smaller than the sum of its proper divisors (26037767148).

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

18059055636 is a wasteful number, since it uses less digits than its factorization.

18059055636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188940 (or 188938 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 18059055636 in words is "eighteen billion, fifty-nine million, fifty-five thousand, six hundred thirty-six".