20530748836525 has 12 divisors (see below), whose sum is σ = 25460185831092. Its totient is φ = 16423271795840.

The previous prime is 20530748836471. The next prime is 20530748836537. The reversal of 20530748836525 is 52563884703502.

It can be written as a sum of positive squares in 6 ways, for example, as 8609183407881 + 11921565428644 = 2934141^2 + 3452762^2 .

It is not a de Polignac number, because 20530748836525 - 2⁷ = 20530748836397 is a prime.

It is a super-3 number, since 3×20530748836525³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20530748836525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32866222 + ... + 33485071.

It is an arithmetic number, because the mean of its divisors is an integer number (2121682152591).

Almost surely, 2^{20530748836525} is an apocalyptic number.

20530748836525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20530748836525 is a deficient number, since it is larger than the sum of its proper divisors (4929436994567).

20530748836525 is a wasteful number, since it uses less digits than its factorization.

20530748836525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66363680 (or 66363675 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 58.

The spelling of 20530748836525 in words is "twenty trillion, five hundred thirty billion, seven hundred forty-eight million, eight hundred thirty-six thousand, five hundred twenty-five".