24130021 has 8 divisors (see below), whose sum is σ = 25628184. Its totient is φ = 22640640.

The previous prime is 24130003. The next prime is 24130027. The reversal of 24130021 is 12003142.

It can be written as a sum of positive squares in 4 ways, for example, as 1185921 + 22944100 = 1089^2 + 4790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 24130021 - 2⁹ = 24129509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24129983 and 24130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24130027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3991 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (3203523).

Almost surely, 2^24130021 is an apocalyptic number.

It is an amenable number.

24130021 is a deficient number, since it is larger than the sum of its proper divisors (1498163).

24130021 is a wasteful number, since it uses less digits than its factorization.

24130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 24130021 is about 4912.2317738478. The cubic root of 24130021 is about 288.9698726990.

Adding to 24130021 its reverse (12003142), we get a palindrome (36133163).

The spelling of 24130021 in words is "twenty-four million, one hundred thirty thousand, twenty-one".