23240621 has 4 divisors (see below), whose sum is σ = 23256000. Its totient is φ = 23225244.

The previous prime is 23240617. The next prime is 23240627. The reversal of 23240621 is 12604232.

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 23240621 - 2² = 23240617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23240593 and 23240602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23240627) 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, 5141 + ... + 8538.

It is an arithmetic number, because the mean of its divisors is an integer number (5814000).

Almost surely, 2^23240621 is an apocalyptic number.

It is an amenable number.

23240621 is a deficient number, since it is larger than the sum of its proper divisors (15379).

23240621 is a wasteful number, since it uses less digits than its factorization.

23240621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15378.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 23240621 is about 4820.8527254004. The cubic root of 23240621 is about 285.3749901271.

Adding to 23240621 its reverse (12604232), we get a palindrome (35844853).

The spelling of 23240621 in words is "twenty-three million, two hundred forty thousand, six hundred twenty-one".