20920125 has 16 divisors (see below), whose sum is σ = 34811712. Its totient is φ = 11157200.

The previous prime is 20920117. The next prime is 20920129. The reversal of 20920125 is 52102902.

It is not a de Polignac number, because 20920125 - 2³ = 20920117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27519 + ... + 28268.

It is an arithmetic number, because the mean of its divisors is an integer number (2175732).

Almost surely, 2^20920125 is an apocalyptic number.

20920125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20920125 is a deficient number, since it is larger than the sum of its proper divisors (13891587).

20920125 is an equidigital number, since it uses as much as digits as its factorization.

20920125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55805 (or 55795 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20920125 is about 4573.8523150622. The cubic root of 20920125 is about 275.5421810397.

The spelling of 20920125 in words is "twenty million, nine hundred twenty thousand, one hundred twenty-five".