18384646404 has 12 divisors (see below), whose sum is σ = 42897508304. Its totient is φ = 6128215464.

The previous prime is 18384646403. The next prime is 18384646417. The reversal of 18384646404 is 40464648381.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×18384646404² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18384646403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766026922 + ... + 766026945.

Almost surely, 2^18384646404 is an apocalyptic number.

It is an amenable number.

18384646404 is an abundant number, since it is smaller than the sum of its proper divisors (24512861900).

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

18384646404 is a wasteful number, since it uses less digits than its factorization.

18384646404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532053874 (or 1532053872 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 18384646404 in words is "eighteen billion, three hundred eighty-four million, six hundred forty-six thousand, four hundred four".