20442111231 has 8 divisors (see below), whose sum is σ = 27256947760. Its totient is φ = 13627674432.

The previous prime is 20442111203. The next prime is 20442111247. The reversal of 20442111231 is 13211124402.

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

It is not a de Polignac number, because 20442111231 - 2¹⁷ = 20441980159 is a prime.

It is a super-2 number, since 2×20442111231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20442111198 and 20442111207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442111271) 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, 52701 + ... + 208953.

It is an arithmetic number, because the mean of its divisors is an integer number (3407118470).

Almost surely, 2^20442111231 is an apocalyptic number.

20442111231 is a deficient number, since it is larger than the sum of its proper divisors (6814836529).

20442111231 is a wasteful number, since it uses less digits than its factorization.

20442111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199865.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20442111231 its reverse (13211124402), we get a palindrome (33653235633).

The spelling of 20442111231 in words is "twenty billion, four hundred forty-two million, one hundred eleven thousand, two hundred thirty-one".