23344021 has 4 divisors (see below), whose sum is σ = 23360044. Its totient is φ = 23328000.

The previous prime is 23343977. The next prime is 23344033. The reversal of 23344021 is 12044332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21808900 + 1535121 = 4670^2 + 1239^2 .

It is a 4-Lehmer number, since φ(23344021) divides (23344021-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23344021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23344021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23344091) 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, 5580 + ... + 8821.

It is an arithmetic number, because the mean of its divisors is an integer number (5840011).

Almost surely, 2^23344021 is an apocalyptic number.

It is an amenable number.

23344021 is a deficient number, since it is larger than the sum of its proper divisors (16023).

23344021 is a wasteful number, since it uses less digits than its factorization.

23344021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23344021 is about 4831.5650673462. The cubic root of 23344021 is about 285.7975852713.

Adding to 23344021 its reverse (12044332), we get a palindrome (35388353).

The spelling of 23344021 in words is "twenty-three million, three hundred forty-four thousand, twenty-one".