20109232320 has 112 divisors (see below), whose sum is σ = 64204047360. Its totient is φ = 5332458496.

The previous prime is 20109232277. The next prime is 20109232333. The reversal of 20109232320 is 2323290102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113329 + ... + 230351.

Almost surely, 2^20109232320 is an apocalyptic number.

20109232320 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 20109232320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32102023680).

20109232320 is an abundant number, since it is smaller than the sum of its proper divisors (44094815040).

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

20109232320 is a wasteful number, since it uses less digits than its factorization.

20109232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117222 (or 117212 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The spelling of 20109232320 in words is "twenty billion, one hundred nine million, two hundred thirty-two thousand, three hundred twenty".