20440142103 has 4 divisors (see below), whose sum is σ = 27253522808. Its totient is φ = 13626761400.

The previous prime is 20440142081. The next prime is 20440142119. The reversal of 20440142103 is 30124104402.

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

It is not a de Polignac number, because 20440142103 - 2⁵ = 20440142071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20440142103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440142153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406690348 + ... + 3406690353.

It is an arithmetic number, because the mean of its divisors is an integer number (6813380702).

Almost surely, 2^20440142103 is an apocalyptic number.

20440142103 is a deficient number, since it is larger than the sum of its proper divisors (6813380705).

20440142103 is an equidigital number, since it uses as much as digits as its factorization.

20440142103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813380704.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20440142103 its reverse (30124104402), we get a palindrome (50564246505).

The spelling of 20440142103 in words is "twenty billion, four hundred forty million, one hundred forty-two thousand, one hundred three".