23511423 has 16 divisors (see below), whose sum is σ = 34850816. Its totient is φ = 14001120.

The previous prime is 23511419. The next prime is 23511457. The reversal of 23511423 is 32411532.

It is not a de Polignac number, because 23511423 - 2² = 23511419 is a prime.

It is a super-2 number, since 2×23511423² = 1105574022969858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23511423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23511473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8515 + ... + 10932.

It is an arithmetic number, because the mean of its divisors is an integer number (2178176).

Almost surely, 2^23511423 is an apocalyptic number.

23511423 is a deficient number, since it is larger than the sum of its proper divisors (11339393).

23511423 is a wasteful number, since it uses less digits than its factorization.

23511423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19494.

The product of its digits is 720, while the sum is 21.

The square root of 23511423 is about 4848.8579067653. The cubic root of 23511423 is about 286.4791185071.

Adding to 23511423 its reverse (32411532), we get a palindrome (55922955).

The spelling of 23511423 in words is "twenty-three million, five hundred eleven thousand, four hundred twenty-three".