20134441091 has 4 divisors (see below), whose sum is σ = 20150986632. Its totient is φ = 20117895552.

The previous prime is 20134441081. The next prime is 20134441099. The reversal of 20134441091 is 19014443102.

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

It is a cyclic number.

It is not a de Polignac number, because 20134441091 - 2⁶ = 20134441027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20134441099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8270945 + ... + 8273378.

It is an arithmetic number, because the mean of its divisors is an integer number (5037746658).

Almost surely, 2^20134441091 is an apocalyptic number.

20134441091 is a deficient number, since it is larger than the sum of its proper divisors (16545541).

20134441091 is a wasteful number, since it uses less digits than its factorization.

20134441091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16545540.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 20134441091 its reverse (19014443102), we get a palindrome (39148884193).

The spelling of 20134441091 in words is "twenty billion, one hundred thirty-four million, four hundred forty-one thousand, ninety-one".