20500052405 has 32 divisors (see below), whose sum is σ = 28481316864. Its totient is φ = 13874607936.

The previous prime is 20500052381. The next prime is 20500052407. The reversal of 20500052405 is 50425000502.

It is not a de Polignac number, because 20500052405 - 2¹⁴ = 20500036021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500052407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097474 + ... + 1115996.

It is an arithmetic number, because the mean of its divisors is an integer number (890041152).

Almost surely, 2^20500052405 is an apocalyptic number.

It is an amenable number.

20500052405 is a deficient number, since it is larger than the sum of its proper divisors (7981264459).

20500052405 is a wasteful number, since it uses less digits than its factorization.

20500052405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18945.

The product of its (nonzero) digits is 2000, while the sum is 23.

Adding to 20500052405 its reverse (50425000502), we get a palindrome (70925052907).

The spelling of 20500052405 in words is "twenty billion, five hundred million, fifty-two thousand, four hundred five".