20543017125 has 16 divisors (see below), whose sum is σ = 34183581120. Its totient is φ = 10956275600.

The previous prime is 20543017087. The next prime is 20543017177. The reversal of 20543017125 is 52171034502.

It is not a de Polignac number, because 20543017125 - 2⁷ = 20543016997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20543017092 and 20543017101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27390315 + ... + 27391064.

It is an arithmetic number, because the mean of its divisors is an integer number (2136473820).

Almost surely, 2^20543017125 is an apocalyptic number.

20543017125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20543017125 is a deficient number, since it is larger than the sum of its proper divisors (13640563995).

20543017125 is an equidigital number, since it uses as much as digits as its factorization.

20543017125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54781397 (or 54781387 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20543017125 in words is "twenty billion, five hundred forty-three million, seventeen thousand, one hundred twenty-five".