20855653 has 16 divisors (see below), whose sum is σ = 26500096. Its totient is φ = 15966720.

The previous prime is 20855633. The next prime is 20855657. The reversal of 20855653 is 35655802.

It is a happy number.

It is not a de Polignac number, because 20855653 - 2⁵ = 20855621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20855657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (1656256).

Almost surely, 2^20855653 is an apocalyptic number.

It is an amenable number.

20855653 is a deficient number, since it is larger than the sum of its proper divisors (5644443).

20855653 is a wasteful number, since it uses less digits than its factorization.

20855653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7444.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 20855653 is about 4566.7989883506. The cubic root of 20855653 is about 275.2588328914.

The spelling of 20855653 in words is "twenty million, eight hundred fifty-five thousand, six hundred fifty-three".