20956825725 has 48 divisors (see below), whose sum is σ = 38277073920. Its totient is φ = 10032235200.

The previous prime is 20956825717. The next prime is 20956825759. The reversal of 20956825725 is 52752865902.

It is not a de Polignac number, because 20956825725 - 2³ = 20956825717 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 95599 + ... + 225948.

It is an arithmetic number, because the mean of its divisors is an integer number (797439040).

Almost surely, 2^20956825725 is an apocalyptic number.

20956825725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20956825725 is a deficient number, since it is larger than the sum of its proper divisors (17320248195).

20956825725 is a wasteful number, since it uses less digits than its factorization.

20956825725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321650 (or 321645 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 51.

The spelling of 20956825725 in words is "twenty billion, nine hundred fifty-six million, eight hundred twenty-five thousand, seven hundred twenty-five".