20525825633 has 2 divisors, whose sum is σ = 20525825634. Its totient is φ = 20525825632.

The previous prime is 20525825563. The next prime is 20525825657. The reversal of 20525825633 is 33652852502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20452432144 + 73393489 = 143012^2 + 8567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20525825633 is a prime.

It is not a weakly prime, because it can be changed into another prime (20525425633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262912816 + 10262912817.

It is an arithmetic number, because the mean of its divisors is an integer number (10262912817).

Almost surely, 2^20525825633 is an apocalyptic number.

It is an amenable number.

20525825633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525825633 is an equidigital number, since it uses as much as digits as its factorization.

20525825633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 20525825633 in words is "twenty billion, five hundred twenty-five million, eight hundred twenty-five thousand, six hundred thirty-three".