18400617484 has 12 divisors (see below), whose sum is σ = 32219112744. Its totient is φ = 9195156704.

The previous prime is 18400617463. The next prime is 18400617497. The reversal of 18400617484 is 48471600481.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18400617484.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279969 + ... + 1294264.

It is an arithmetic number, because the mean of its divisors is an integer number (2684926062).

Almost surely, 2^18400617484 is an apocalyptic number.

It is an amenable number.

18400617484 is a deficient number, since it is larger than the sum of its proper divisors (13818495260).

18400617484 is a wasteful number, since it uses less digits than its factorization.

18400617484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576024 (or 2576022 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 18400617484 in words is "eighteen billion, four hundred million, six hundred seventeen thousand, four hundred eighty-four".