20434242103 has 4 divisors (see below), whose sum is σ = 22291900488. Its totient is φ = 18576583720.

The previous prime is 20434242067. The next prime is 20434242161. The reversal of 20434242103 is 30124243402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20434242103 - 2²¹ = 20432144951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434242173) 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, 928829176 + ... + 928829197.

It is an arithmetic number, because the mean of its divisors is an integer number (5572975122).

Almost surely, 2^20434242103 is an apocalyptic number.

20434242103 is a deficient number, since it is larger than the sum of its proper divisors (1857658385).

20434242103 is a wasteful number, since it uses less digits than its factorization.

20434242103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857658384.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20434242103 its reverse (30124243402), we get a palindrome (50558485505).

The spelling of 20434242103 in words is "twenty billion, four hundred thirty-four million, two hundred forty-two thousand, one hundred three".