23236621 has 4 divisors (see below), whose sum is σ = 23357212. Its totient is φ = 23116032.

The previous prime is 23236613. The next prime is 23236643. The reversal of 23236621 is 12663232.

It is a happy number.

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 12602500 + 10634121 = 3550^2 + 3261^2 .

It is a cyclic number.

It is not a de Polignac number, because 23236621 - 2³ = 23236613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23236121) 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, 60006 + ... + 60391.

It is an arithmetic number, because the mean of its divisors is an integer number (5839303).

Almost surely, 2^23236621 is an apocalyptic number.

It is an amenable number.

23236621 is a deficient number, since it is larger than the sum of its proper divisors (120591).

23236621 is a wasteful number, since it uses less digits than its factorization.

23236621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120590.

The product of its digits is 2592, while the sum is 25.

The square root of 23236621 is about 4820.4378431840. The cubic root of 23236621 is about 285.3586169924.

Adding to 23236621 its reverse (12663232), we get a palindrome (35899853).

The spelling of 23236621 in words is "twenty-three million, two hundred thirty-six thousand, six hundred twenty-one".