20061371091 has 4 divisors (see below), whose sum is σ = 26748494792. Its totient is φ = 13374247392.

The previous prime is 20061371089. The next prime is 20061371111. The reversal of 20061371091 is 19017316002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20061371091 - 2¹ = 20061371089 is a prime.

It is a super-2 number, since 2×20061371091² (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 (20061371191) 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, 3343561846 + ... + 3343561851.

It is an arithmetic number, because the mean of its divisors is an integer number (6687123698).

Almost surely, 2^20061371091 is an apocalyptic number.

20061371091 is a deficient number, since it is larger than the sum of its proper divisors (6687123701).

20061371091 is an equidigital number, since it uses as much as digits as its factorization.

20061371091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687123700.

The product of its (nonzero) digits is 2268, while the sum is 30.

Adding to 20061371091 its reverse (19017316002), we get a palindrome (39078687093).

The spelling of 20061371091 in words is "twenty billion, sixty-one million, three hundred seventy-one thousand, ninety-one".