20113032505 has 16 divisors (see below), whose sum is σ = 25340569920. Its totient is φ = 15303701952.

The previous prime is 20113032491. The next prime is 20113032517. The reversal of 20113032505 is 50523031102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20113032505 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1025439 + ... + 1044868.

It is an arithmetic number, because the mean of its divisors is an integer number (1583785620).

Almost surely, 2^20113032505 is an apocalyptic number.

It is an amenable number.

20113032505 is a deficient number, since it is larger than the sum of its proper divisors (5227537415).

20113032505 is a wasteful number, since it uses less digits than its factorization.

20113032505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070408.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 20113032505 its reverse (50523031102), we get a palindrome (70636063607).

The spelling of 20113032505 in words is "twenty billion, one hundred thirteen million, thirty-two thousand, five hundred five".