23208621 has 16 divisors (see below), whose sum is σ = 33079104. Its totient is φ = 14422784.

The previous prime is 23208611. The next prime is 23208623. The reversal of 23208621 is 12680232.

It is a cyclic number.

It is not a de Polignac number, because 23208621 - 2⁵ = 23208589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23208591 and 23208600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23208623) 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 15 ways as a sum of consecutive naturals, for example, 3331 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (2067444).

Almost surely, 2^23208621 is an apocalyptic number.

It is an amenable number.

23208621 is a deficient number, since it is larger than the sum of its proper divisors (9870483).

23208621 is a wasteful number, since it uses less digits than its factorization.

23208621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 23208621 is about 4817.5326672478. The cubic root of 23208621 is about 285.2439524041.

Adding to 23208621 its reverse (12680232), we get a palindrome (35888853).

The spelling of 23208621 in words is "twenty-three million, two hundred eight thousand, six hundred twenty-one".