23023621 has 4 divisors (see below), whose sum is σ = 24024672. Its totient is φ = 22022572.

The previous prime is 23023613. The next prime is 23023633. The reversal of 23023621 is 12632032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23023621 - 2³ = 23023613 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23023691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500491 + ... + 500536.

It is an arithmetic number, because the mean of its divisors is an integer number (6006168).

Almost surely, 2^23023621 is an apocalyptic number.

It is an amenable number.

23023621 is a deficient number, since it is larger than the sum of its proper divisors (1001051).

23023621 is a wasteful number, since it uses less digits than its factorization.

23023621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001050.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 23023621 is about 4798.2935508366. The cubic root of 23023621 is about 284.4840197226.

Adding to 23023621 its reverse (12632032), we get a palindrome (35655653).

The spelling of 23023621 in words is "twenty-three million, twenty-three thousand, six hundred twenty-one".