20853351 has 12 divisors (see below), whose sum is σ = 30433312. Its totient is φ = 13758336.

The previous prime is 20853319. The next prime is 20853361. The reversal of 20853351 is 15335802.

It is not a de Polignac number, because 20853351 - 2⁵ = 20853319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11071 + ... + 12816.

Almost surely, 2^20853351 is an apocalyptic number.

20853351 is a deficient number, since it is larger than the sum of its proper divisors (9579961).

20853351 is a wasteful number, since it uses less digits than its factorization.

20853351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23990 (or 23987 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20853351 is about 4566.5469449027. The cubic root of 20853351 is about 275.2487050354.

The spelling of 20853351 in words is "twenty million, eight hundred fifty-three thousand, three hundred fifty-one".