20507320273 has 8 divisors (see below), whose sum is σ = 22408977600. Its totient is φ = 18611888880.

The previous prime is 20507320271. The next prime is 20507320289. The reversal of 20507320273 is 37202370502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20507320273 - 2¹ = 20507320271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20507320271) 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 7 ways as a sum of consecutive naturals, for example, 1549590 + ... + 1562767.

It is an arithmetic number, because the mean of its divisors is an integer number (2801122200).

Almost surely, 2^20507320273 is an apocalyptic number.

It is an amenable number.

20507320273 is a deficient number, since it is larger than the sum of its proper divisors (1901657327).

20507320273 is a wasteful number, since it uses less digits than its factorization.

20507320273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112967.

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

Adding to 20507320273 its reverse (37202370502), we get a palindrome (57709690775).

The spelling of 20507320273 in words is "twenty billion, five hundred seven million, three hundred twenty thousand, two hundred seventy-three".