18504641904 has 160 divisors (see below), whose sum is σ = 57341758464. Its totient is φ = 5027573760.

The previous prime is 18504641879. The next prime is 18504641921. The reversal of 18504641904 is 40914640581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1330024 + ... + 1343864.

Almost surely, 2^18504641904 is an apocalyptic number.

18504641904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18504641904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28670879232).

18504641904 is an abundant number, since it is smaller than the sum of its proper divisors (38837116560).

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

18504641904 is a wasteful number, since it uses less digits than its factorization.

18504641904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14055 (or 14049 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 18504641904 in words is "eighteen billion, five hundred four million, six hundred forty-one thousand, nine hundred four".