18804531648 has 168 divisors, whose sum is σ = 60923424000. Its totient is φ = 5089900032.

The previous prime is 18804531643. The next prime is 18804531673. The reversal of 18804531648 is 84613540881.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×18804531648² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 18804531597 and 18804531606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18804531643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126153 + ... + 231351.

Almost surely, 2^18804531648 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 18804531648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30461712000).

18804531648 is an abundant number, since it is smaller than the sum of its proper divisors (42118892352).

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

18804531648 is a wasteful number, since it uses less digits than its factorization.

18804531648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105247 (or 105230 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 18804531648 in words is "eighteen billion, eight hundred four million, five hundred thirty-one thousand, six hundred forty-eight".