20853512 has 16 divisors (see below), whose sum is σ = 39206700. Its totient is φ = 10398400.

The previous prime is 20853499. The next prime is 20853517. The reversal of 20853512 is 21535802.

It can be written as a sum of positive squares in 2 ways, for example, as 20124196 + 729316 = 4486^2 + 854^2 .

It is not an unprimeable number, because it can be changed into a prime (20853517) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 239 + ... + 6462.

Almost surely, 2^20853512 is an apocalyptic number.

It is an amenable number.

20853512 is a deficient number, since it is larger than the sum of its proper divisors (18353188).

20853512 is a wasteful number, since it uses less digits than its factorization.

20853512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096 (or 7092 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20853512 is about 4566.5645730680. The cubic root of 20853512 is about 275.2494133936.

The spelling of 20853512 in words is "twenty million, eight hundred fifty-three thousand, five hundred twelve".