20235231223 has 4 divisors (see below), whose sum is σ = 21425538960. Its totient is φ = 19044923488.

The previous prime is 20235231187. The next prime is 20235231227. The reversal of 20235231223 is 32213253202.

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 20235231223 - 2⁹ = 20235230711 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 (20235231227) 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, 595153843 + ... + 595153876.

It is an arithmetic number, because the mean of its divisors is an integer number (5356384740).

Almost surely, 2^20235231223 is an apocalyptic number.

20235231223 is a deficient number, since it is larger than the sum of its proper divisors (1190307737).

20235231223 is a wasteful number, since it uses less digits than its factorization.

20235231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190307736.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20235231223 its reverse (32213253202), we get a palindrome (52448484425).

The spelling of 20235231223 in words is "twenty billion, two hundred thirty-five million, two hundred thirty-one thousand, two hundred twenty-three".