20169338500 has 48 divisors (see below), whose sum is σ = 44217613440. Its totient is φ = 8037007200.

The previous prime is 20169338471. The next prime is 20169338573. The reversal of 20169338500 is 583396102.

It is a self number, because there is not a number n which added to its sum of digits gives 20169338500.

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 15 ways as a sum of consecutive naturals, for example, 54811 + ... + 208189.

It is an arithmetic number, because the mean of its divisors is an integer number (921200280).

Almost surely, 2^20169338500 is an apocalyptic number.

20169338500 is a gapful number since it is divisible by the number (20) 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 20169338500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22108806720).

20169338500 is an abundant number, since it is smaller than the sum of its proper divisors (24048274940).

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

20169338500 is a wasteful number, since it uses less digits than its factorization.

20169338500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153661 (or 153649 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 20169338500 in words is "twenty billion, one hundred sixty-nine million, three hundred thirty-eight thousand, five hundred".