20105000605 has 16 divisors (see below), whose sum is σ = 24248347200. Its totient is φ = 16002645120.

The previous prime is 20105000569. The next prime is 20105000611. The reversal of 20105000605 is 50600050102.

It is a happy number.

It is not a de Polignac number, because 20105000605 - 2⁹ = 20105000093 is a prime.

It is a super-2 number, since 2×20105000605² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781345 + ... + 806665.

It is an arithmetic number, because the mean of its divisors is an integer number (1515521700).

Almost surely, 2^20105000605 is an apocalyptic number.

It is an amenable number.

20105000605 is a deficient number, since it is larger than the sum of its proper divisors (4143346595).

20105000605 is a wasteful number, since it uses less digits than its factorization.

20105000605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26124.

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 20105000605 its reverse (50600050102), we get a palindrome (70705050707).

The spelling of 20105000605 in words is "twenty billion, one hundred five million, six hundred five", and thus it is an aban number.