20856273 has 8 divisors (see below), whose sum is σ = 28705536. Its totient is φ = 13455600.

The previous prime is 20856259. The next prime is 20856317. The reversal of 20856273 is 37265802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20856273 - 2¹⁰ = 20855249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20856223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112038 + ... + 112223.

It is an arithmetic number, because the mean of its divisors is an integer number (3588192).

Almost surely, 2^20856273 is an apocalyptic number.

It is an amenable number.

20856273 is a deficient number, since it is larger than the sum of its proper divisors (7849263).

20856273 is a wasteful number, since it uses less digits than its factorization.

20856273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224295.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20856273 is about 4566.8668690909. The cubic root of 20856273 is about 275.2615605097.

The spelling of 20856273 in words is "twenty million, eight hundred fifty-six thousand, two hundred seventy-three".