20853036 has 18 divisors (see below), whose sum is σ = 52711932. Its totient is φ = 6951000.

The previous prime is 20853031. The next prime is 20853037. The reversal of 20853036 is 63035802.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×20853036² = 869698220834592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20853031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289590 + ... + 289661.

Almost surely, 2^20853036 is an apocalyptic number.

It is an amenable number.

20853036 is an abundant number, since it is smaller than the sum of its proper divisors (31858896).

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

20853036 is a wasteful number, since it uses less digits than its factorization.

20853036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579261 (or 579256 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20853036 is about 4566.5124548171. The cubic root of 20853036 is about 275.2473191066.

Adding to 20853036 its reverse (63035802), we get a palindrome (83888838).

The spelling of 20853036 in words is "twenty million, eight hundred fifty-three thousand, thirty-six".