18380655036 has 144 divisors (see below), whose sum is σ = 49151950848. Its totient is φ = 5783356800.

The previous prime is 18380655031. The next prime is 18380655037. The reversal of 18380655036 is 63055608381.

18380655036 is a `hidden beast` number, since 1 + 8 + 3 + 80 + 65 + 503 + 6 = 666.

It is a super-2 number, since 2×18380655036² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18380654982 and 18380655000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380655031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11296455 + ... + 11298081.

It is an arithmetic number, because the mean of its divisors is an integer number (341332992).

Almost surely, 2^18380655036 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 18380655036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24575975424).

18380655036 is an abundant number, since it is smaller than the sum of its proper divisors (30771295812).

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

18380655036 is a wasteful number, since it uses less digits than its factorization.

18380655036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 18380655036 in words is "eighteen billion, three hundred eighty million, six hundred fifty-five thousand, thirty-six".