24780013 has 2 divisors, whose sum is σ = 24780014. Its totient is φ = 24780012.

The previous prime is 24779987. The next prime is 24780071. The reversal of 24780013 is 31008742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24730729 + 49284 = 4973^2 + 222^2 .

It is a cyclic number.

It is not a de Polignac number, because 24780013 - 2⁵ = 24779981 is a prime.

It is a super-2 number, since 2×24780013² = 1228098088560338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 24780013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24780073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12390006 + 12390007.

It is an arithmetic number, because the mean of its divisors is an integer number (12390007).

Almost surely, 2^24780013 is an apocalyptic number.

It is an amenable number.

24780013 is a deficient number, since it is larger than the sum of its proper divisors (1).

24780013 is an equidigital number, since it uses as much as digits as its factorization.

24780013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 24780013 is about 4977.9526916193. The cubic root of 24780013 is about 291.5415846062.

Adding to 24780013 its reverse (31008742), we get a palindrome (55788755).

The spelling of 24780013 in words is "twenty-four million, seven hundred eighty thousand, thirteen".