20440423103 has 8 divisors (see below), whose sum is σ = 20467511760. Its totient is φ = 20413353600.

The previous prime is 20440423049. The next prime is 20440423123. The reversal of 20440423103 is 30132404402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20440423103 is a prime.

It is a super-2 number, since 2×20440423103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440423123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4161413 + ... + 4166321.

It is an arithmetic number, because the mean of its divisors is an integer number (2558438970).

Almost surely, 2^20440423103 is an apocalyptic number.

20440423103 is a deficient number, since it is larger than the sum of its proper divisors (27088657).

20440423103 is a wasteful number, since it uses less digits than its factorization.

20440423103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20440423103 its reverse (30132404402), we get a palindrome (50572827505).

The spelling of 20440423103 in words is "twenty billion, four hundred forty million, four hundred twenty-three thousand, one hundred three".