23239021 has 12 divisors (see below), whose sum is σ = 25327200. Its totient is φ = 21312720.

The previous prime is 23239003. The next prime is 23239031. The reversal of 23239021 is 12093232.

It is not a de Polignac number, because 23239021 - 2¹³ = 23230829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23238983 and 23239001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23239001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33286 + ... + 33976.

It is an arithmetic number, because the mean of its divisors is an integer number (2110600).

Almost surely, 2^23239021 is an apocalyptic number.

It is an amenable number.

23239021 is a deficient number, since it is larger than the sum of its proper divisors (2088179).

23239021 is a wasteful number, since it uses less digits than its factorization.

23239021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 23239021 is about 4820.6867767985. The cubic root of 23239021 is about 285.3684410987.

The spelling of 23239021 in words is "twenty-three million, two hundred thirty-nine thousand, twenty-one".