18228748032 has 432 divisors, whose sum is σ = 62997322752. Its totient is φ = 5195612160.

The previous prime is 18228748019. The next prime is 18228748037. The reversal of 18228748032 is 23084782281.

It is a tau number, because it is divible by the number of its divisors (432).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18228748037) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11632113 + ... + 11633679.

It is an arithmetic number, because the mean of its divisors is an integer number (145827136).

Almost surely, 2^18228748032 is an apocalyptic number.

18228748032 is a gapful number since it is divisible by the number (12) 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 18228748032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31498661376).

18228748032 is an abundant number, since it is smaller than the sum of its proper divisors (44768574720).

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

18228748032 is a wasteful number, since it uses less digits than its factorization.

18228748032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 18228748032 in words is "eighteen billion, two hundred twenty-eight million, seven hundred forty-eight thousand, thirty-two".