20855834 has 8 divisors (see below), whose sum is σ = 31336308. Its totient is φ = 10410400.

The previous prime is 20855831. The next prime is 20855867. The reversal of 20855834 is 43855802.

It can be written as a sum of positive squares in 2 ways, for example, as 20729809 + 126025 = 4553^2 + 355^2 .

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 = 20855794 and 20855803.

It is not an unprimeable number, because it can be changed into a prime (20855831) by changing a digit.

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, 7217 + ... + 9684.

Almost surely, 2^20855834 is an apocalyptic number.

20855834 is a deficient number, since it is larger than the sum of its proper divisors (10480474).

20855834 is a wasteful number, since it uses less digits than its factorization.

20855834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17520.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 20855834 is about 4566.8188052516. The cubic root of 20855834 is about 275.2596291855.

The spelling of 20855834 in words is "twenty million, eight hundred fifty-five thousand, eight hundred thirty-four".