20323311123155 has 16 divisors (see below), whose sum is σ = 24722323809120. Its totient is φ = 16035753431808.

The previous prime is 20323311123151. The next prime is 20323311123179. The reversal of 20323311123155 is 55132111332302.

It is a cyclic number.

It is not a de Polignac number, because 20323311123155 - 2² = 20323311123151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20323311123151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41076836 + ... + 41568654.

It is an arithmetic number, because the mean of its divisors is an integer number (1545145238070).

Almost surely, 2^{20323311123155} is an apocalyptic number.

20323311123155 is a deficient number, since it is larger than the sum of its proper divisors (4399012685965).

20323311123155 is a wasteful number, since it uses less digits than its factorization.

20323311123155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605110.

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 20323311123155 its reverse (55132111332302), we get a palindrome (75455422455457).

The spelling of 20323311123155 in words is "twenty trillion, three hundred twenty-three billion, three hundred eleven million, one hundred twenty-three thousand, one hundred fifty-five".