24242442421 has 4 divisors (see below), whose sum is σ = 24583885344. Its totient is φ = 23900999500.

The previous prime is 24242442379. The next prime is 24242442467. The reversal of 24242442421 is 12424424242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12424424242 = 2 ⋅6212212121.

It is a cyclic number.

It is not a de Polignac number, because 24242442421 - 2¹⁷ = 24242311349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24242445421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170721355 + ... + 170721496.

It is an arithmetic number, because the mean of its divisors is an integer number (6145971336).

Almost surely, 2^24242442421 is an apocalyptic number.

It is an amenable number.

24242442421 is a deficient number, since it is larger than the sum of its proper divisors (341442923).

24242442421 is an equidigital number, since it uses as much as digits as its factorization.

24242442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341442922.

The product of its digits is 32768, while the sum is 31.

Adding to 24242442421 its reverse (12424424242), we get a palindrome (36666866663).

The spelling of 24242442421 in words is "twenty-four billion, two hundred forty-two million, four hundred forty-two thousand, four hundred twenty-one".