18435549216 has 384 divisors, whose sum is σ = 61436067840. Its totient is φ = 4721587200.

The previous prime is 18435549193. The next prime is 18435549221. The reversal of 18435549216 is 61294553481.

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

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 63 ways as a sum of consecutive naturals, for example, 18602481 + ... + 18603471.

It is an arithmetic number, because the mean of its divisors is an integer number (159989760).

Almost surely, 2^18435549216 is an apocalyptic number.

18435549216 is a gapful number since it is divisible by the number (16) 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 18435549216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30718033920).

18435549216 is an abundant number, since it is smaller than the sum of its proper divisors (43000518624).

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

18435549216 is a wasteful number, since it uses less digits than its factorization.

18435549216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1100 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 48.

The spelling of 18435549216 in words is "eighteen billion, four hundred thirty-five million, five hundred forty-nine thousand, two hundred sixteen".