20001110091 has 8 divisors (see below), whose sum is σ = 27388907664. Its totient is φ = 12973692960.

The previous prime is 20001110053. The next prime is 20001110099. The reversal of 20001110091 is 19001110002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001110091 - 2⁶ = 20001110027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001110091.

It is not an unprimeable number, because it can be changed into a prime (20001110099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90094980 + ... + 90095201.

It is an arithmetic number, because the mean of its divisors is an integer number (3423613458).

Almost surely, 2^20001110091 is an apocalyptic number.

20001110091 is a deficient number, since it is larger than the sum of its proper divisors (7387797573).

20001110091 is a wasteful number, since it uses less digits than its factorization.

20001110091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180190221.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 20001110091 its reverse (19001110002), we get a palindrome (39002220093).

The spelling of 20001110091 in words is "twenty billion, one million, one hundred ten thousand, ninety-one".