20055621340273 has 4 divisors (see below), whose sum is σ = 20522031138928. Its totient is φ = 19589211541620.

The previous prime is 20055621340253. The next prime is 20055621340289. The reversal of 20055621340273 is 37204312655002.

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 not a de Polignac number, because 20055621340273 - 2¹³ = 20055621332081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20055621340253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233204899263 + ... + 233204899348.

It is an arithmetic number, because the mean of its divisors is an integer number (5130507784732).

Almost surely, 2^{20055621340273} is an apocalyptic number.

It is an amenable number.

20055621340273 is a deficient number, since it is larger than the sum of its proper divisors (466409798655).

20055621340273 is an equidigital number, since it uses as much as digits as its factorization.

20055621340273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466409798654.

The product of its (nonzero) digits is 302400, while the sum is 40.

Adding to 20055621340273 its reverse (37204312655002), we get a palindrome (57259933995275).

The spelling of 20055621340273 in words is "twenty trillion, fifty-five billion, six hundred twenty-one million, three hundred forty thousand, two hundred seventy-three".