20863125 has 30 divisors (see below), whose sum is σ = 37667630. Its totient is φ = 11124000.

The previous prime is 20863123. The next prime is 20863133. The reversal of 20863125 is 52136802.

20863125 is a `hidden beast` number, since 2 + 0 + 8 + 631 + 25 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 10712529 + 10150596 = 3273^2 + 3186^2 .

It is not a de Polignac number, because 20863125 - 2¹ = 20863123 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863123) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 3771 + ... + 7479.

Almost surely, 2^20863125 is an apocalyptic number.

20863125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20863125 is a deficient number, since it is larger than the sum of its proper divisors (16804505).

20863125 is an equidigital number, since it uses as much as digits as its factorization.

20863125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20863125 is about 4567.6169935755. The cubic root of 20863125 is about 275.2917014926.

Adding to 20863125 its reverse (52136802), we get a palindrome (72999927).

The spelling of 20863125 in words is "twenty million, eight hundred sixty-three thousand, one hundred twenty-five".