23521423 has 4 divisors (see below), whose sum is σ = 23560408. Its totient is φ = 23482440.

The previous prime is 23521409. The next prime is 23521427. The reversal of 23521423 is 32412532.

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 23521423 - 2⁵ = 23521391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23521394 and 23521403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23521427) 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, 18573 + ... + 19798.

It is an arithmetic number, because the mean of its divisors is an integer number (5890102).

Almost surely, 2^23521423 is an apocalyptic number.

23521423 is a deficient number, since it is larger than the sum of its proper divisors (38985).

23521423 is an equidigital number, since it uses as much as digits as its factorization.

23521423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38984.

The product of its digits is 1440, while the sum is 22.

The square root of 23521423 is about 4849.8889678012. Note that the first 3 decimals coincide. The cubic root of 23521423 is about 286.5197283435.

Adding to 23521423 its reverse (32412532), we get a palindrome (55933955).

The spelling of 23521423 in words is "twenty-three million, five hundred twenty-one thousand, four hundred twenty-three".