23011020223 has 4 divisors (see below), whose sum is σ = 23302299040. Its totient is φ = 22719741408.

The previous prime is 23011020203. The next prime is 23011020281. The reversal of 23011020223 is 32202011032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23011020223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23011020197 and 23011020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011020203) 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, 145639290 + ... + 145639447.

It is an arithmetic number, because the mean of its divisors is an integer number (5825574760).

Almost surely, 2^23011020223 is an apocalyptic number.

23011020223 is a deficient number, since it is larger than the sum of its proper divisors (291278817).

23011020223 is an equidigital number, since it uses as much as digits as its factorization.

23011020223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291278816.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23011020223 its reverse (32202011032), we get a palindrome (55213031255).

The spelling of 23011020223 in words is "twenty-three billion, eleven million, twenty thousand, two hundred twenty-three".