20311122233 has 8 divisors (see below), whose sum is σ = 21196738368. Its totient is φ = 19425716464.

The previous prime is 20311122199. The next prime is 20311122241. The reversal of 20311122233 is 33222111302.

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

It is not a de Polignac number, because 20311122233 - 2¹⁰ = 20311121209 is a prime.

It is a super-3 number, since 3×20311122233³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311122133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163691 + ... + 259647.

It is an arithmetic number, because the mean of its divisors is an integer number (2649592296).

Almost surely, 2^20311122233 is an apocalyptic number.

20311122233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20311122233 is a deficient number, since it is larger than the sum of its proper divisors (885616135).

20311122233 is an equidigital number, since it uses as much as digits as its factorization.

20311122233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105183.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20311122233 its reverse (33222111302), we get a palindrome (53533233535).

The spelling of 20311122233 in words is "twenty billion, three hundred eleven million, one hundred twenty-two thousand, two hundred thirty-three".