20109117207 has 16 divisors (see below), whose sum is σ = 27277649120. Its totient is φ = 13174659072.

The previous prime is 20109117167. The next prime is 20109117211. The reversal of 20109117207 is 70271190102.

It is a happy number.

It is not a de Polignac number, because 20109117207 - 2³¹ = 17961633559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20109117277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105082 + ... + 226407.

It is an arithmetic number, because the mean of its divisors is an integer number (1704853070).

Almost surely, 2^20109117207 is an apocalyptic number.

20109117207 is a deficient number, since it is larger than the sum of its proper divisors (7168531913).

20109117207 is a wasteful number, since it uses less digits than its factorization.

20109117207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331842.

The product of its (nonzero) digits is 1764, while the sum is 30.

The spelling of 20109117207 in words is "twenty billion, one hundred nine million, one hundred seventeen thousand, two hundred seven".