18228921480 has 1024 divisors, whose sum is σ = 81285120000. Its totient is φ = 3519728640.

The previous prime is 18228921479. The next prime is 18228921511. The reversal of 18228921480 is 8412982281.

18228921480 is a `hidden beast` number, since 1 + 82 + 2 + 8 + 92 + 1 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 131143251 + ... + 131143389.

It is an arithmetic number, because the mean of its divisors is an integer number (79380000).

Almost surely, 2^18228921480 is an apocalyptic number.

18228921480 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 18228921480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560000).

18228921480 is an abundant number, since it is smaller than the sum of its proper divisors (63056198520).

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

18228921480 is a wasteful number, since it uses less digits than its factorization.

18228921480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 18228921480 in words is "eighteen billion, two hundred twenty-eight million, nine hundred twenty-one thousand, four hundred eighty".