18459009450 has 144 divisors (see below), whose sum is σ = 56736416256. Its totient is φ = 4214851200.

The previous prime is 18459009433. The next prime is 18459009451. The reversal of 18459009450 is 5490095481.

18459009450 is a `hidden beast` number, since 1 + 8 + 4 + 590 + 0 + 9 + 4 + 50 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 18459009396 and 18459009405.

It is not an unprimeable number, because it can be changed into a prime (18459009451) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3818535 + ... + 3823365.

Almost surely, 2^18459009450 is an apocalyptic number.

18459009450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18459009450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28368208128).

18459009450 is an abundant number, since it is smaller than the sum of its proper divisors (38277406806).

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

18459009450 is a wasteful number, since it uses less digits than its factorization.

18459009450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6069 (or 6061 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 18459009450 in words is "eighteen billion, four hundred fifty-nine million, nine thousand, four hundred fifty".