24389521081 has 2 divisors, whose sum is σ = 24389521082. Its totient is φ = 24389521080.

The previous prime is 24389521073. The next prime is 24389521141. The reversal of 24389521081 is 18012598342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23655978025 + 733543056 = 153805^2 + 27084^2 .

It is a cyclic number.

It is not a de Polignac number, because 24389521081 - 2³ = 24389521073 is a prime.

It is a super-2 number, since 2×24389521081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (24389521001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12194760540 + 12194760541.

It is an arithmetic number, because the mean of its divisors is an integer number (12194760541).

Almost surely, 2^24389521081 is an apocalyptic number.

It is an amenable number.

24389521081 is a deficient number, since it is larger than the sum of its proper divisors (1).

24389521081 is an equidigital number, since it uses as much as digits as its factorization.

24389521081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 24389521081 in words is "twenty-four billion, three hundred eighty-nine million, five hundred twenty-one thousand, eighty-one".