20525120533 has 6 divisors (see below), whose sum is σ = 21257289794. Its totient is φ = 19817356944.

The previous prime is 20525120503. The next prime is 20525120549. The reversal of 20525120533 is 33502152502.

It can be written as a sum of positive squares in 3 ways, for example, as 1030538404 + 19494582129 = 32102^2 + 139623^2 .

It is not a de Polignac number, because 20525120533 - 2⁵ = 20525120501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525120503) 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 in 5 ways as a sum of consecutive naturals, for example, 12201966 + ... + 12203647.

Almost surely, 2^20525120533 is an apocalyptic number.

It is an amenable number.

20525120533 is a deficient number, since it is larger than the sum of its proper divisors (732169261).

20525120533 is an equidigital number, since it uses as much as digits as its factorization.

20525120533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24405671 (or 24405642 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 20525120533 in words is "twenty billion, five hundred twenty-five million, one hundred twenty thousand, five hundred thirty-three".