24789077021 has 2 divisors, whose sum is σ = 24789077022. Its totient is φ = 24789077020.

The previous prime is 24789077003. The next prime is 24789077063. The reversal of 24789077021 is 12077098742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24788928025 + 148996 = 157445^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 24789077021 - 2⁶ = 24789076957 is a prime.

It is a super-2 number, since 2×24789077021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24789077921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12394538510 + 12394538511.

It is an arithmetic number, because the mean of its divisors is an integer number (12394538511).

Almost surely, 2^24789077021 is an apocalyptic number.

It is an amenable number.

24789077021 is a deficient number, since it is larger than the sum of its proper divisors (1).

24789077021 is an equidigital number, since it uses as much as digits as its factorization.

24789077021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 24789077021 in words is "twenty-four billion, seven hundred eighty-nine million, seventy-seven thousand, twenty-one".