20500055170 has 32 divisors (see below), whose sum is σ = 42221104128. Its totient is φ = 7020330048.

The previous prime is 20500055159. The next prime is 20500055179. The reversal of 20500055170 is 7155000502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20500055179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111954 + ... + 231373.

It is an arithmetic number, because the mean of its divisors is an integer number (1319409504).

Almost surely, 2^20500055170 is an apocalyptic number.

20500055170 is an abundant number, since it is smaller than the sum of its proper divisors (21721048958).

20500055170 is a wasteful number, since it uses less digits than its factorization.

20500055170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344194.

The product of its (nonzero) digits is 1750, while the sum is 25.

Adding to 20500055170 its reverse (7155000502), we get a palindrome (27655055672).

The spelling of 20500055170 in words is "twenty billion, five hundred million, fifty-five thousand, one hundred seventy".