20768543525 has 6 divisors (see below), whose sum is σ = 25752994002. Its totient is φ = 16614834800.

The previous prime is 20768543501. The next prime is 20768543533. The reversal of 20768543525 is 52534586702.

It can be written as a sum of positive squares in 3 ways, for example, as 335842276 + 20432701249 = 18326^2 + 142943^2 .

It is not a de Polignac number, because 20768543525 - 2⁸ = 20768543269 is a prime.

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 20768543525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415370846 + ... + 415370895.

It is an arithmetic number, because the mean of its divisors is an integer number (4292165667).

Almost surely, 2^20768543525 is an apocalyptic number.

20768543525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20768543525 is a deficient number, since it is larger than the sum of its proper divisors (4984450477).

20768543525 is an equidigital number, since it uses as much as digits as its factorization.

20768543525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830741751 (or 830741746 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 20768543525 in words is "twenty billion, seven hundred sixty-eight million, five hundred forty-three thousand, five hundred twenty-five".