18394380384 has 192 divisors, whose sum is σ = 50932240128. Its totient is φ = 5806080000.

The previous prime is 18394380383. The next prime is 18394380401. The reversal of 18394380384 is 48308349381.

It is a super-2 number, since 2×18394380384² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18394380383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42481032 + ... + 42481464.

It is an arithmetic number, because the mean of its divisors is an integer number (265272084).

Almost surely, 2^18394380384 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 18394380384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25466120064).

18394380384 is an abundant number, since it is smaller than the sum of its proper divisors (32537859744).

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

18394380384 is a wasteful number, since it uses less digits than its factorization.

18394380384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 18394380384 in words is "eighteen billion, three hundred ninety-four million, three hundred eighty thousand, three hundred eighty-four".