20109100099 has 24 divisors (see below), whose sum is σ = 22440377232. Its totient is φ = 17870785920.

The previous prime is 20109100087. The next prime is 20109100103. The reversal of 20109100099 is 99000190102.

It is not a de Polignac number, because 20109100099 - 2¹⁵ = 20109067331 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20109100099.

It is not an unprimeable number, because it can be changed into a prime (20109100019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9793957 + ... + 9796009.

It is an arithmetic number, because the mean of its divisors is an integer number (935015718).

Almost surely, 2^20109100099 is an apocalyptic number.

20109100099 is a deficient number, since it is larger than the sum of its proper divisors (2331277133).

20109100099 is a wasteful number, since it uses less digits than its factorization.

20109100099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2434 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 20109100099 in words is "twenty billion, one hundred nine million, one hundred thousand, ninety-nine".