18383138480 has 40 divisors (see below), whose sum is σ = 48846626592. Its totient is φ = 6302790144.

The previous prime is 18383138461. The next prime is 18383138509. The reversal of 18383138480 is 8483138381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16412957 + ... + 16414076.

Almost surely, 2^18383138480 is an apocalyptic number.

18383138480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18383138480 is an abundant number, since it is smaller than the sum of its proper divisors (30463488112).

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

18383138480 is a wasteful number, since it uses less digits than its factorization.

18383138480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32827053 (or 32827047 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

Subtracting from 18383138480 its reverse (8483138381), we obtain a palindrome (9900000099).

The spelling of 18383138480 in words is "eighteen billion, three hundred eighty-three million, one hundred thirty-eight thousand, four hundred eighty".