20938125 has 40 divisors (see below), whose sum is σ = 37612960. Its totient is φ = 10296000.

The previous prime is 20938117. The next prime is 20938193. The reversal of 20938125 is 52183902.

It is a happy number.

It is not a de Polignac number, because 20938125 - 2³ = 20938117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20938092 and 20938101.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 23946 + ... + 24804.

It is an arithmetic number, because the mean of its divisors is an integer number (940324).

Almost surely, 2^20938125 is an apocalyptic number.

20938125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20938125 is a deficient number, since it is larger than the sum of its proper divisors (16674835).

20938125 is an equidigital number, since it uses as much as digits as its factorization.

20938125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20938125 is about 4575.8195987167. The cubic root of 20938125 is about 275.6211853072.

The spelling of 20938125 in words is "twenty million, nine hundred thirty-eight thousand, one hundred twenty-five".