20440121233 has 8 divisors (see below), whose sum is σ = 23991493952. Its totient is φ = 17046587376.

The previous prime is 20440121171. The next prime is 20440121239. The reversal of 20440121233 is 33212104402.

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

It is not a de Polignac number, because 20440121233 - 2²⁹ = 19903250321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440121239) 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, 39459435 + ... + 39459952.

It is an arithmetic number, because the mean of its divisors is an integer number (2998936744).

Almost surely, 2^20440121233 is an apocalyptic number.

It is an amenable number.

20440121233 is a deficient number, since it is larger than the sum of its proper divisors (3551372719).

20440121233 is an equidigital number, since it uses as much as digits as its factorization.

20440121233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78919431.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20440121233 its reverse (33212104402), we get a palindrome (53652225635).

The spelling of 20440121233 in words is "twenty billion, four hundred forty million, one hundred twenty-one thousand, two hundred thirty-three".