20555442311 has 4 divisors (see below), whose sum is σ = 20555816400. Its totient is φ = 20555068224.

The previous prime is 20555442301. The next prime is 20555442319. The reversal of 20555442311 is 11324455502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20555442311 - 2⁶ = 20555442247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555442319) 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, 86666 + ... + 220503.

It is an arithmetic number, because the mean of its divisors is an integer number (5138954100).

Almost surely, 2^20555442311 is an apocalyptic number.

20555442311 is a deficient number, since it is larger than the sum of its proper divisors (374089).

20555442311 is an equidigital number, since it uses as much as digits as its factorization.

20555442311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374088.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 20555442311 its reverse (11324455502), we get a palindrome (31879897813).

The spelling of 20555442311 in words is "twenty billion, five hundred fifty-five million, four hundred forty-two thousand, three hundred eleven".