20663302525 has 6 divisors (see below), whose sum is σ = 25622495162. Its totient is φ = 16530642000.

The previous prime is 20663302483. The next prime is 20663302529. The reversal of 20663302525 is 52520336602.

It can be written as a sum of positive squares in 3 ways, for example, as 4352436729 + 16310865796 = 65973^2 + 127714^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20663302525 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 (20663302529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413266026 + ... + 413266075.

Almost surely, 2^20663302525 is an apocalyptic number.

20663302525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20663302525 is a deficient number, since it is larger than the sum of its proper divisors (4959192637).

20663302525 is an equidigital number, since it uses as much as digits as its factorization.

20663302525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826532111 (or 826532106 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

The spelling of 20663302525 in words is "twenty billion, six hundred sixty-three million, three hundred two thousand, five hundred twenty-five".