18486544000 has 128 divisors (see below), whose sum is σ = 48382027200. Its totient is φ = 7005312000.

The previous prime is 18486543983. The next prime is 18486544049. The reversal of 18486544000 is 44568481.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 273595 + ... + 334405.

Almost surely, 2^18486544000 is an apocalyptic number.

18486544000 is a gapful number since it is divisible by the number (10) 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 18486544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24191013600).

18486544000 is an abundant number, since it is smaller than the sum of its proper divisors (29895483200).

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

18486544000 is an equidigital number, since it uses as much as digits as its factorization.

18486544000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60859 (or 60837 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 18486544000 in words is "eighteen billion, four hundred eighty-six million, five hundred forty-four thousand".