20525243329 has 2 divisors, whose sum is σ = 20525243330. Its totient is φ = 20525243328.

The previous prime is 20525243311. The next prime is 20525243351. The reversal of 20525243329 is 92334252502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16698583729 + 3826659600 = 129223^2 + 61860^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525243329 - 2⁷ = 20525243201 is a prime.

It is a super-2 number, since 2×20525243329² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20525213329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262621664 + 10262621665.

It is an arithmetic number, because the mean of its divisors is an integer number (10262621665).

Almost surely, 2^20525243329 is an apocalyptic number.

It is an amenable number.

20525243329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525243329 is an equidigital number, since it uses as much as digits as its factorization.

20525243329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20525243329 in words is "twenty billion, five hundred twenty-five million, two hundred forty-three thousand, three hundred twenty-nine".