20853012 has 24 divisors (see below), whose sum is σ = 48750912. Its totient is φ = 6937600.

The previous prime is 20852981. The next prime is 20853023. The reversal of 20853012 is 21035802.

It is a self number, because there is not a number n which added to its sum of digits gives 20853012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6337 + ... + 9047.

It is an arithmetic number, because the mean of its divisors is an integer number (2031288).

Almost surely, 2^20853012 is an apocalyptic number.

It is an amenable number.

20853012 is an abundant number, since it is smaller than the sum of its proper divisors (27897900).

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

20853012 is a wasteful number, since it uses less digits than its factorization.

20853012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359 (or 3357 counting only the distinct ones).

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

The square root of 20853012 is about 4566.5098269904. The cubic root of 20853012 is about 275.2472135115.

Adding to 20853012 its reverse (21035802), we get a palindrome (41888814).

The spelling of 20853012 in words is "twenty million, eight hundred fifty-three thousand, twelve".