20021852 has 12 divisors (see below), whose sum is σ = 37099440. Its totient is φ = 9422016.

The previous prime is 20021851. The next prime is 20021873. The reversal of 20021852 is 25812002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147152 + ... + 147287.

It is an arithmetic number, because the mean of its divisors is an integer number (3091620).

Almost surely, 2^20021852 is an apocalyptic number.

It is an amenable number.

20021852 is a deficient number, since it is larger than the sum of its proper divisors (17077588).

20021852 is a wasteful number, since it uses less digits than its factorization.

20021852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294460 (or 294458 counting only the distinct ones).

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

The square root of 20021852 is about 4474.5784158957. The cubic root of 20021852 is about 271.5405847664.

Adding to 20021852 its reverse (25812002), we get a palindrome (45833854).

The spelling of 20021852 in words is "twenty million, twenty-one thousand, eight hundred fifty-two".