24036421 has 4 divisors (see below), whose sum is σ = 24686092. Its totient is φ = 23386752.

The previous prime is 24036391. The next prime is 24036427. The reversal of 24036421 is 12463042.

It is a happy number.

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 16112196 + 7924225 = 4014^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 24036421 - 2⁷ = 24036293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24036392 and 24036401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24036427) 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, 324780 + ... + 324853.

It is an arithmetic number, because the mean of its divisors is an integer number (6171523).

Almost surely, 2^24036421 is an apocalyptic number.

It is an amenable number.

24036421 is a deficient number, since it is larger than the sum of its proper divisors (649671).

24036421 is an equidigital number, since it uses as much as digits as its factorization.

24036421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649670.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 24036421 is about 4902.6952791296. The cubic root of 24036421 is about 288.5957519025.

Adding to 24036421 its reverse (12463042), we get a palindrome (36499463).

The spelling of 24036421 in words is "twenty-four million, thirty-six thousand, four hundred twenty-one".