20185226 has 4 divisors (see below), whose sum is σ = 30277842. Its totient is φ = 10092612.

The previous prime is 20185213. The next prime is 20185241. The reversal of 20185226 is 62258102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19936225 + 249001 = 4465^2 + 499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20185195 and 20185204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5046305 + ... + 5046308.

Almost surely, 2^20185226 is an apocalyptic number.

20185226 is a deficient number, since it is larger than the sum of its proper divisors (10092616).

20185226 is a wasteful number, since it uses less digits than its factorization.

20185226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092615.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20185226 is about 4492.7971242868. The cubic root of 20185226 is about 272.2771558597.

The spelling of 20185226 in words is "twenty million, one hundred eighty-five thousand, two hundred twenty-six".