20523113103 has 16 divisors (see below), whose sum is σ = 27492566400. Its totient is φ = 13618018656.

The previous prime is 20523113087. The next prime is 20523113113. The reversal of 20523113103 is 30131132502.

It is not a de Polignac number, because 20523113103 - 2⁴ = 20523113087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20523113103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523113113) 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 15 ways as a sum of consecutive naturals, for example, 537748 + ... + 574646.

It is an arithmetic number, because the mean of its divisors is an integer number (1718285400).

Almost surely, 2^20523113103 is an apocalyptic number.

20523113103 is a deficient number, since it is larger than the sum of its proper divisors (6969453297).

20523113103 is a wasteful number, since it uses less digits than its factorization.

20523113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37766.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 20523113103 its reverse (30131132502), we get a palindrome (50654245605).

The spelling of 20523113103 in words is "twenty billion, five hundred twenty-three million, one hundred thirteen thousand, one hundred three".