20001179091 has 16 divisors (see below), whose sum is σ = 26713234944. Its totient is φ = 13311645024.

The previous prime is 20001179071. The next prime is 20001179101. The reversal of 20001179091 is 19097110002.

It is not a de Polignac number, because 20001179091 - 2¹¹ = 20001177043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001179021) 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, 8392086 + ... + 8394468.

It is an arithmetic number, because the mean of its divisors is an integer number (1669577184).

Almost surely, 2^20001179091 is an apocalyptic number.

20001179091 is a deficient number, since it is larger than the sum of its proper divisors (6712055853).

20001179091 is a wasteful number, since it uses less digits than its factorization.

20001179091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930.

The product of its (nonzero) digits is 1134, while the sum is 30.

Adding to 20001179091 its reverse (19097110002), we get a palindrome (39098289093).

The spelling of 20001179091 in words is "twenty billion, one million, one hundred seventy-nine thousand, ninety-one".