20500237273 has 4 divisors (see below), whose sum is σ = 20500866000. Its totient is φ = 20499608548.

The previous prime is 20500237183. The next prime is 20500237319. The reversal of 20500237273 is 37273200502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20500237273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20500237073) 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 3 ways as a sum of consecutive naturals, for example, 262615 + ... + 331612.

It is an arithmetic number, because the mean of its divisors is an integer number (5125216500).

Almost surely, 2^20500237273 is an apocalyptic number.

It is an amenable number.

20500237273 is a deficient number, since it is larger than the sum of its proper divisors (628727).

20500237273 is an equidigital number, since it uses as much as digits as its factorization.

20500237273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628726.

The product of its (nonzero) digits is 17640, while the sum is 31.

Adding to 20500237273 its reverse (37273200502), we get a palindrome (57773437775).

The spelling of 20500237273 in words is "twenty billion, five hundred million, two hundred thirty-seven thousand, two hundred seventy-three".