20712125 has 16 divisors (see below), whose sum is σ = 29542656. Its totient is φ = 14202000.

The previous prime is 20712113. The next prime is 20712143. The reversal of 20712125 is 52121702.

It is not a de Polignac number, because 20712125 - 2⁸ = 20711869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20712097 and 20712106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10961 + ... + 12710.

It is an arithmetic number, because the mean of its divisors is an integer number (1846416).

Almost surely, 2^20712125 is an apocalyptic number.

20712125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20712125 is a deficient number, since it is larger than the sum of its proper divisors (8830531).

20712125 is an equidigital number, since it uses as much as digits as its factorization.

20712125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23693 (or 23683 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20712125 is about 4551.0575694008. The cubic root of 20712125 is about 274.6259377022.

Adding to 20712125 its reverse (52121702), we get a palindrome (72833827).

The spelling of 20712125 in words is "twenty million, seven hundred twelve thousand, one hundred twenty-five".