20547125 has 8 divisors (see below), whose sum is σ = 25642968. Its totient is φ = 16437600.

The previous prime is 20547089. The next prime is 20547139. The reversal of 20547125 is 52174502.

It can be written as a sum of positive squares in 4 ways, for example, as 682276 + 19864849 = 826^2 + 4457^2 .

It is not a de Polignac number, because 20547125 - 2¹⁸ = 20284981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20547094 and 20547103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82064 + ... + 82313.

It is an arithmetic number, because the mean of its divisors is an integer number (3205371).

Almost surely, 2^20547125 is an apocalyptic number.

20547125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20547125 is a deficient number, since it is larger than the sum of its proper divisors (5095843).

20547125 is an equidigital number, since it uses as much as digits as its factorization.

20547125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164392 (or 164382 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 20547125 is about 4532.8936674050. The cubic root of 20547125 is about 273.8947373027.

The spelling of 20547125 in words is "twenty million, five hundred forty-seven thousand, one hundred twenty-five".