20385243576 has 96 divisors (see below), whose sum is σ = 57268514160. Its totient is φ = 6546064896.

The previous prime is 20385243539. The next prime is 20385243611. The reversal of 20385243576 is 67534258302.

20385243576 is a `hidden beast` number, since 2 + 0 + 38 + 5 + 2 + 43 + 576 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 180910 + ... + 271106.

Almost surely, 2^20385243576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20385243576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28634257080).

20385243576 is an abundant number, since it is smaller than the sum of its proper divisors (36883270584).

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

20385243576 is a wasteful number, since it uses less digits than its factorization.

20385243576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90325 (or 90318 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 20385243576 in words is "twenty billion, three hundred eighty-five million, two hundred forty-three thousand, five hundred seventy-six".