20803125 has 48 divisors (see below), whose sum is σ = 39747456. Its totient is φ = 9480000.

The previous prime is 20803091. The next prime is 20803129. The reversal of 20803125 is 52130802.

It is not a de Polignac number, because 20803125 - 2⁶ = 20803061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65467 + ... + 65783.

It is an arithmetic number, because the mean of its divisors is an integer number (828072).

Almost surely, 2^20803125 is an apocalyptic number.

20803125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20803125 is a deficient number, since it is larger than the sum of its proper divisors (18944331).

20803125 is an frugal number, since it uses more digits than its factorization.

20803125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20803125 is about 4561.0442883182. The cubic root of 20803125 is about 275.0275454502.

Adding to 20803125 its reverse (52130802), we get a palindrome (72933927).

The spelling of 20803125 in words is "twenty million, eight hundred three thousand, one hundred twenty-five".