20440440220191 has 8 divisors (see below), whose sum is σ = 28133079012864. Its totient is φ = 13187380787160.

The previous prime is 20440440220169. The next prime is 20440440220229. The reversal of 20440440220191 is 19102204404402.

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

It is not a de Polignac number, because 20440440220191 - 2⁵ = 20440440220159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440440220091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109894839801 + ... + 109894839986.

It is an arithmetic number, because the mean of its divisors is an integer number (3516634876608).

Almost surely, 2^{20440440220191} is an apocalyptic number.

20440440220191 is a deficient number, since it is larger than the sum of its proper divisors (7692638792673).

20440440220191 is a wasteful number, since it uses less digits than its factorization.

20440440220191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219789679821.

The product of its (nonzero) digits is 18432, while the sum is 33.

Adding to 20440440220191 its reverse (19102204404402), we get a palindrome (39542644624593).

The spelling of 20440440220191 in words is "twenty trillion, four hundred forty billion, four hundred forty million, two hundred twenty thousand, one hundred ninety-one".