20855033 has 4 divisors (see below), whose sum is σ = 21527808. Its totient is φ = 20182260.

The previous prime is 20855017. The next prime is 20855041. The reversal of 20855033 is 33055802.

20855033 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20855033 - 2⁴ = 20855017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20854993 and 20855011.

It is not an unprimeable number, because it can be changed into a prime (20855333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336341 + ... + 336402.

It is an arithmetic number, because the mean of its divisors is an integer number (5381952).

Almost surely, 2^20855033 is an apocalyptic number.

It is an amenable number.

20855033 is a deficient number, since it is larger than the sum of its proper divisors (672775).

20855033 is an equidigital number, since it uses as much as digits as its factorization.

20855033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672774.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20855033 is about 4566.7311066013. The cubic root of 20855033 is about 275.2561052189.

The spelling of 20855033 in words is "twenty million, eight hundred fifty-five thousand, thirty-three".