18387166824 has 96 divisors (see below), whose sum is σ = 53776369920. Its totient is φ = 5642068608.

The previous prime is 18387166823. The next prime is 18387166859. The reversal of 18387166824 is 42866178381.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18387166823) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 316749 + ... + 370275.

It is an arithmetic number, because the mean of its divisors is an integer number (560170520).

Almost surely, 2^18387166824 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 18387166824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26888184960).

18387166824 is an abundant number, since it is smaller than the sum of its proper divisors (35389203096).

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

18387166824 is a wasteful number, since it uses less digits than its factorization.

18387166824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53919 (or 53912 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 18387166824 in words is "eighteen billion, three hundred eighty-seven million, one hundred sixty-six thousand, eight hundred twenty-four".