20356266 has 24 divisors (see below), whose sum is σ = 47360160. Its totient is φ = 5815992.

The previous prime is 20356241. The next prime is 20356267. The reversal of 20356266 is 66265302.

It is not an unprimeable number, because it can be changed into a prime (20356267) 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 11 ways as a sum of consecutive naturals, for example, 34326 + ... + 34913.

It is an arithmetic number, because the mean of its divisors is an integer number (1973340).

Almost surely, 2^20356266 is an apocalyptic number.

20356266 is an abundant number, since it is smaller than the sum of its proper divisors (27003894).

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

20356266 is a wasteful number, since it uses less digits than its factorization.

20356266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69258 (or 69251 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20356266 is about 4511.7918834982. The cubic root of 20356266 is about 273.0440428613.

The spelling of 20356266 in words is "twenty million, three hundred fifty-six thousand, two hundred sixty-six".