20002311091 has 4 divisors (see below), whose sum is σ = 22859784112. Its totient is φ = 17144838072.

The previous prime is 20002311083. The next prime is 20002311097. The reversal of 20002311091 is 19011320002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19011320002 = 2 ⋅9505660001.

It is a cyclic number.

It is not a de Polignac number, because 20002311091 - 2³ = 20002311083 is a prime.

It is a super-2 number, since 2×20002311091² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002311097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428736500 + ... + 1428736513.

It is an arithmetic number, because the mean of its divisors is an integer number (5714946028).

Almost surely, 2^20002311091 is an apocalyptic number.

20002311091 is a deficient number, since it is larger than the sum of its proper divisors (2857473021).

20002311091 is an equidigital number, since it uses as much as digits as its factorization.

20002311091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857473020.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 20002311091 its reverse (19011320002), we get a palindrome (39013631093).

The spelling of 20002311091 in words is "twenty billion, two million, three hundred eleven thousand, ninety-one".