16920045450 has 720 divisors, whose sum is σ = 62438485824. Its totient is φ = 3353011200.

The previous prime is 16920045421. The next prime is 16920045451. The reversal of 16920045450 is 5454002961.

16920045450 is a `hidden beast` number, since 169 + 2 + 0 + 0 + 45 + 450 = 666.

16920045450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16920045451) 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 359 ways as a sum of consecutive naturals, for example, 50207682 + ... + 50208018.

Almost surely, 2^16920045450 is an apocalyptic number.

16920045450 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 16920045450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31219242912).

16920045450 is an abundant number, since it is smaller than the sum of its proper divisors (45518440374).

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

16920045450 is a wasteful number, since it uses less digits than its factorization.

16920045450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 16920045450 in words is "sixteen billion, nine hundred twenty million, forty-five thousand, four hundred fifty".