23417021 has 4 divisors (see below), whose sum is σ = 23566332. Its totient is φ = 23267712.

The previous prime is 23417011. The next prime is 23417029. The reversal of 23417021 is 12071432.

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 3960100 + 19456921 = 1990^2 + 4411^2 .

It is a cyclic number.

It is not a de Polignac number, because 23417021 - 2⁶ = 23416957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23416984 and 23417002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23417029) 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 3 ways as a sum of consecutive naturals, for example, 74420 + ... + 74733.

It is an arithmetic number, because the mean of its divisors is an integer number (5891583).

Almost surely, 2^23417021 is an apocalyptic number.

It is an amenable number.

23417021 is a deficient number, since it is larger than the sum of its proper divisors (149311).

23417021 is a wasteful number, since it uses less digits than its factorization.

23417021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149310.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 23417021 is about 4839.1136585123. The cubic root of 23417021 is about 286.0951848726.

Adding to 23417021 its reverse (12071432), we get a palindrome (35488453).

The spelling of 23417021 in words is "twenty-three million, four hundred seventeen thousand, twenty-one".