20855226 has 32 divisors (see below), whose sum is σ = 50474880. Its totient is φ = 5607936.

The previous prime is 20855221. The next prime is 20855231. The reversal of 20855226 is 62255802.

It is an interprime number because it is at equal distance from previous prime (20855221) and next prime (20855231).

It is a super-2 number, since 2×20855226² = 869880903022152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20855193 and 20855202.

It is not an unprimeable number, because it can be changed into a prime (20855221) 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, 13891 + ... + 15318.

It is an arithmetic number, because the mean of its divisors is an integer number (1577340).

Almost surely, 2^20855226 is an apocalyptic number.

20855226 is an abundant number, since it is smaller than the sum of its proper divisors (29619654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20855226 is a wasteful number, since it uses less digits than its factorization.

20855226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29238.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20855226 is about 4566.7522376411. The cubic root of 20855226 is about 275.2569543228.

The spelling of 20855226 in words is "twenty million, eight hundred fifty-five thousand, two hundred twenty-six".