20440124411 has 4 divisors (see below), whose sum is σ = 23360142192. Its totient is φ = 17520106632.

The previous prime is 20440124371. The next prime is 20440124477. The reversal of 20440124411 is 11442104402.

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

It is not a de Polignac number, because 20440124411 - 2¹⁰ = 20440123387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440114411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460008880 + ... + 1460008893.

It is an arithmetic number, because the mean of its divisors is an integer number (5840035548).

Almost surely, 2^20440124411 is an apocalyptic number.

20440124411 is a deficient number, since it is larger than the sum of its proper divisors (2920017781).

20440124411 is an equidigital number, since it uses as much as digits as its factorization.

20440124411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920017780.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 20440124411 its reverse (11442104402), we get a palindrome (31882228813).

The spelling of 20440124411 in words is "twenty billion, four hundred forty million, one hundred twenty-four thousand, four hundred eleven".