20338509184 has 96 divisors (see below), whose sum is σ = 49182951600. Its totient is φ = 8337466368.

The previous prime is 20338509179. The next prime is 20338509193. The reversal of 20338509184 is 48190583302.

It is a self number, because there is not a number n which added to its sum of digits gives 20338509184.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73762 + ... + 214750.

Almost surely, 2^20338509184 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 20338509184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24591475800).

20338509184 is an abundant number, since it is smaller than the sum of its proper divisors (28844442416).

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

20338509184 is a wasteful number, since it uses less digits than its factorization.

20338509184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141040 (or 141021 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 20338509184 in words is "twenty billion, three hundred thirty-eight million, five hundred nine thousand, one hundred eighty-four".