20109906624 has 112 divisors (see below), whose sum is σ = 55242378720. Its totient is φ = 6448619520.

The previous prime is 20109906617. The next prime is 20109906647. The reversal of 20109906624 is 42660990102.

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, 1558182 + ... + 1571034.

Almost surely, 2^20109906624 is an apocalyptic number.

20109906624 is a gapful number since it is divisible by the number (24) 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 20109906624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27621189360).

20109906624 is an abundant number, since it is smaller than the sum of its proper divisors (35132472096).

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

20109906624 is a wasteful number, since it uses less digits than its factorization.

20109906624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13178 (or 13168 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 20109906624 in words is "twenty billion, one hundred nine million, nine hundred six thousand, six hundred twenty-four".