23124021 has 4 divisors (see below), whose sum is σ = 30832032. Its totient is φ = 15416012.

The previous prime is 23124019. The next prime is 23124037. The reversal of 23124021 is 12042132.

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 23124021 - 2¹ = 23124019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23129021) 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 3 ways as a sum of consecutive naturals, for example, 3854001 + ... + 3854006.

It is an arithmetic number, because the mean of its divisors is an integer number (7708008).

Almost surely, 2^23124021 is an apocalyptic number.

It is an amenable number.

23124021 is a deficient number, since it is larger than the sum of its proper divisors (7708011).

23124021 is an equidigital number, since it uses as much as digits as its factorization.

23124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7708010.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 23124021 is about 4808.7442227675. The cubic root of 23124021 is about 284.8969402683.

Adding to 23124021 its reverse (12042132), we get a palindrome (35166153).

The spelling of 23124021 in words is "twenty-three million, one hundred twenty-four thousand, twenty-one".