18423230064 has 80 divisors (see below), whose sum is σ = 49504164864. Its totient is φ = 5897548800.

The previous prime is 18423230057. The next prime is 18423230071. The reversal of 18423230064 is 46003232481.

It is an interprime number because it is at equal distance from previous prime (18423230057) and next prime (18423230071).

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, 147672 + ... + 242184.

Almost surely, 2^18423230064 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 18423230064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24752082432).

18423230064 is an abundant number, since it is smaller than the sum of its proper divisors (31080934800).

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

18423230064 is a wasteful number, since it uses less digits than its factorization.

18423230064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94686 (or 94680 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 18423230064 in words is "eighteen billion, four hundred twenty-three million, two hundred thirty thousand, sixty-four".