18362418064 has 45 divisors (see below), whose sum is σ = 37569291003. Its totient is φ = 8693109216.

The previous prime is 18362418049. The next prime is 18362418073. The reversal of 18362418064 is 46081426381.

The square root of 18362418064 is 135508.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×18362418064² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18362418064.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10297717 + ... + 10299499.

Almost surely, 2^18362418064 is an apocalyptic number.

18362418064 is the 135508-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18362418064

18362418064 is an abundant number, since it is smaller than the sum of its proper divisors (19206872939).

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

18362418064 is an frugal number, since it uses more digits than its factorization.

18362418064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 18362418064 in words is "eighteen billion, three hundred sixty-two million, four hundred eighteen thousand, sixty-four".