20852120 has 32 divisors (see below), whose sum is σ = 49388400. Its totient is φ = 7901568.

The previous prime is 20852113. The next prime is 20852123. The reversal of 20852120 is 2125802.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20852092 and 20852101.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12959 + ... + 14478.

Almost surely, 2^20852120 is an apocalyptic number.

20852120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20852120 is an abundant number, since it is smaller than the sum of its proper divisors (28536280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20852120 is a wasteful number, since it uses less digits than its factorization.

20852120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27467 (or 27463 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20852120 is about 4566.4121583580. The cubic root of 20852120 is about 275.2432888344.

Adding to 20852120 its reverse (2125802), we get a palindrome (22977922).

The spelling of 20852120 in words is "twenty million, eight hundred fifty-two thousand, one hundred twenty".