20856338 has 8 divisors (see below), whose sum is σ = 32931120. Its totient is φ = 9879300.

The previous prime is 20856317. The next prime is 20856347. The reversal of 20856338 is 83365802.

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

It is a junction number, because it is equal to n+sod(n) for n = 20856298 and 20856307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274388 + ... + 274463.

It is an arithmetic number, because the mean of its divisors is an integer number (4116390).

Almost surely, 2^20856338 is an apocalyptic number.

20856338 is a deficient number, since it is larger than the sum of its proper divisors (12074782).

20856338 is a wasteful number, since it uses less digits than its factorization.

20856338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548872.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 20856338 is about 4566.8739855617. The cubic root of 20856338 is about 275.2618464666.

The spelling of 20856338 in words is "twenty million, eight hundred fifty-six thousand, three hundred thirty-eight".