20530435103 has 4 divisors (see below), whose sum is σ = 20531595120. Its totient is φ = 20529275088.

The previous prime is 20530435039. The next prime is 20530435109. The reversal of 20530435103 is 30153403502.

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 20530435103 - 2⁶ = 20530435039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530435109) 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, 553043 + ... + 588996.

It is an arithmetic number, because the mean of its divisors is an integer number (5132898780).

Almost surely, 2^20530435103 is an apocalyptic number.

20530435103 is a deficient number, since it is larger than the sum of its proper divisors (1160017).

20530435103 is a wasteful number, since it uses less digits than its factorization.

20530435103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160016.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20530435103 its reverse (30153403502), we get a palindrome (50683838605).

The spelling of 20530435103 in words is "twenty billion, five hundred thirty million, four hundred thirty-five thousand, one hundred three".