20431251022233 has 4 divisors (see below), whose sum is σ = 27241668029648. Its totient is φ = 13620834014820.

The previous prime is 20431251022163. The next prime is 20431251022291. The reversal of 20431251022233 is 33222015213402.

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 not a de Polignac number, because 20431251022233 - 2⁹ = 20431251021721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20431251022233.

It is not an unprimeable number, because it can be changed into a prime (20431251092233) 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, 3405208503703 + ... + 3405208503708.

It is an arithmetic number, because the mean of its divisors is an integer number (6810417007412).

Almost surely, 2^{20431251022233} is an apocalyptic number.

It is an amenable number.

20431251022233 is a deficient number, since it is larger than the sum of its proper divisors (6810417007415).

20431251022233 is an equidigital number, since it uses as much as digits as its factorization.

20431251022233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810417007414.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20431251022233 its reverse (33222015213402), we get a palindrome (53653266235635).

The spelling of 20431251022233 in words is "twenty trillion, four hundred thirty-one billion, two hundred fifty-one million, twenty-two thousand, two hundred thirty-three".