20109503232 has 360 divisors, whose sum is σ = 73807417376. Its totient is φ = 5303107584.

The previous prime is 20109503177. The next prime is 20109503251. The reversal of 20109503232 is 23230590102.

20109503232 is a `hidden beast` number, since 20 + 109 + 503 + 2 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20109503196 and 20109503205.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1881648 + ... + 1892304.

Almost surely, 2^20109503232 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 20109503232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36903708688).

20109503232 is an abundant number, since it is smaller than the sum of its proper divisors (53697914144).

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

20109503232 is a wasteful number, since it uses less digits than its factorization.

20109503232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10705 (or 10682 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The spelling of 20109503232 in words is "twenty billion, one hundred nine million, five hundred three thousand, two hundred thirty-two".