20853016 has 32 divisors (see below), whose sum is σ = 41815440. Its totient is φ = 9714688.

The previous prime is 20852981. The next prime is 20853023. The reversal of 20853016 is 61035802.

It is a happy number.

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, 13836 + ... + 15268.

Almost surely, 2^20853016 is an apocalyptic number.

It is an amenable number.

20853016 is an abundant number, since it is smaller than the sum of its proper divisors (20962424).

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

20853016 is a wasteful number, since it uses less digits than its factorization.

20853016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20853016 is about 4566.5102649616. The cubic root of 20853016 is about 275.2472311107.

Adding to 20853016 its reverse (61035802), we get a palindrome (81888818).

The spelling of 20853016 in words is "twenty million, eight hundred fifty-three thousand, sixteen".