23120563 has 4 divisors (see below), whose sum is σ = 23399208. Its totient is φ = 22841920.

The previous prime is 23120557. The next prime is 23120599. The reversal of 23120563 is 36502132.

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-23120563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23123563) 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, 139198 + ... + 139363.

It is an arithmetic number, because the mean of its divisors is an integer number (5849802).

Almost surely, 2^23120563 is an apocalyptic number.

23120563 is a deficient number, since it is larger than the sum of its proper divisors (278645).

23120563 is an equidigital number, since it uses as much as digits as its factorization.

23120563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278644.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23120563 is about 4808.3846559942. The cubic root of 23120563 is about 284.8827382583.

Adding to 23120563 its reverse (36502132), we get a palindrome (59622695).

The spelling of 23120563 in words is "twenty-three million, one hundred twenty thousand, five hundred sixty-three".