20155303311311 has 12 divisors (see below), whose sum is σ = 23496170595768. Its totient is φ = 17238980726352.

The previous prime is 20155303311287. The next prime is 20155303311313. The reversal of 20155303311311 is 11311330355102.

It is not a de Polignac number, because 20155303311311 - 2³⁴ = 20138123442127 is a prime.

It is a super-2 number, since 2×20155303311311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155303311313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 440376176 + ... + 440421941.

It is an arithmetic number, because the mean of its divisors is an integer number (1958014216314).

Almost surely, 2^{20155303311311} is an apocalyptic number.

20155303311311 is a deficient number, since it is larger than the sum of its proper divisors (3340867284457).

20155303311311 is an equidigital number, since it uses as much as digits as its factorization.

20155303311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880798598 (or 880798591 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 29.

Adding to 20155303311311 its reverse (11311330355102), we get a palindrome (31466633666413).

The spelling of 20155303311311 in words is "twenty trillion, one hundred fifty-five billion, three hundred three million, three hundred eleven thousand, three hundred eleven".