20852125 has 16 divisors (see below), whose sum is σ = 29742336. Its totient is φ = 14298000.

The previous prime is 20852123. The next prime is 20852141. The reversal of 20852125 is 52125802.

It is not a de Polignac number, because 20852125 - 2¹ = 20852123 is a prime.

It is a super-2 number, since 2×20852125² = 869622234031250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20852125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20852123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11041 + ... + 12790.

It is an arithmetic number, because the mean of its divisors is an integer number (1858896).

Almost surely, 2^20852125 is an apocalyptic number.

20852125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20852125 is a deficient number, since it is larger than the sum of its proper divisors (8890211).

20852125 is an equidigital number, since it uses as much as digits as its factorization.

20852125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23853 (or 23843 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20852125 is about 4566.4127058338. The cubic root of 20852125 is about 275.2433108340.

Multiplying 20852125 by its sum of digits (25), we get a palindrome (521303125).

Adding to 20852125 its reverse (52125802), we get a palindrome (72977927).

The spelling of 20852125 in words is "twenty million, eight hundred fifty-two thousand, one hundred twenty-five".