24220421 has 4 divisors (see below), whose sum is σ = 25495200. Its totient is φ = 22945644.

The previous prime is 24220411. The next prime is 24220429. The reversal of 24220421 is 12402242.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-24220421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 24220421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24220429) 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, 637361 + ... + 637398.

It is an arithmetic number, because the mean of its divisors is an integer number (6373800).

Almost surely, 2^24220421 is an apocalyptic number.

It is an amenable number.

24220421 is a deficient number, since it is larger than the sum of its proper divisors (1274779).

24220421 is a wasteful number, since it uses less digits than its factorization.

24220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274778.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 24220421 is about 4921.4246920988. The cubic root of 24220421 is about 289.3302857329.

Adding to 24220421 its reverse (12402242), we get a palindrome (36622663).

The spelling of 24220421 in words is "twenty-four million, two hundred twenty thousand, four hundred twenty-one".