24204240421 has 2 divisors, whose sum is σ = 24204240422. Its totient is φ = 24204240420.

The previous prime is 24204240409. The next prime is 24204240461. The reversal of 24204240421 is 12404240242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19974168900 + 4230071521 = 141330^2 + 65039^2 .

It is a cyclic number.

It is not a de Polignac number, because 24204240421 - 2⁷ = 24204240293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24204240461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12102120210 + 12102120211.

It is an arithmetic number, because the mean of its divisors is an integer number (12102120211).

Almost surely, 2^24204240421 is an apocalyptic number.

It is an amenable number.

24204240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

24204240421 is an equidigital number, since it uses as much as digits as its factorization.

24204240421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 24204240421 its reverse (12404240242), we get a palindrome (36608480663).

The spelling of 24204240421 in words is "twenty-four billion, two hundred four million, two hundred forty thousand, four hundred twenty-one".