18247634320 has 80 divisors (see below), whose sum is σ = 42928680960. Its totient is φ = 7212989952.

The previous prime is 18247634299. The next prime is 18247634323. The reversal of 18247634320 is 2343674281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (18247634323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2668666 + ... + 2675494.

It is an arithmetic number, because the mean of its divisors is an integer number (536608512).

Almost surely, 2^18247634320 is an apocalyptic number.

18247634320 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 18247634320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21464340480).

18247634320 is an abundant number, since it is smaller than the sum of its proper divisors (24681046640).

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

18247634320 is a wasteful number, since it uses less digits than its factorization.

18247634320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232 (or 7226 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 18247634320 in words is "eighteen billion, two hundred forty-seven million, six hundred thirty-four thousand, three hundred twenty".