24219421 has 2 divisors, whose sum is σ = 24219422. Its totient is φ = 24219420.

The previous prime is 24219409. The next prime is 24219427. The reversal of 24219421 is 12491242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 1466521 = 4770^2 + 1211^2 .

It is a cyclic number.

It is not a de Polignac number, because 24219421 - 2¹⁵ = 24186653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24219427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12109710 + 12109711.

It is an arithmetic number, because the mean of its divisors is an integer number (12109711).

Almost surely, 2^24219421 is an apocalyptic number.

It is an amenable number.

24219421 is a deficient number, since it is larger than the sum of its proper divisors (1).

24219421 is an equidigital number, since it uses as much as digits as its factorization.

24219421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 24219421 is about 4921.3230944534. The cubic root of 24219421 is about 289.3263037726.

The spelling of 24219421 in words is "twenty-four million, two hundred nineteen thousand, four hundred twenty-one".