20266361 has 4 divisors (see below), whose sum is σ = 20568912. Its totient is φ = 19963812.

The previous prime is 20266349. The next prime is 20266391. The reversal of 20266361 is 16366202.

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 20266361 - 2⁶ = 20266297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20266361.

It is not an unprimeable number, because it can be changed into a prime (20266391) 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, 151175 + ... + 151308.

It is an arithmetic number, because the mean of its divisors is an integer number (5142228).

Almost surely, 2^20266361 is an apocalyptic number.

It is an amenable number.

20266361 is a deficient number, since it is larger than the sum of its proper divisors (302551).

20266361 is an equidigital number, since it uses as much as digits as its factorization.

20266361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302550.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20266361 is about 4501.8175218460. The cubic root of 20266361 is about 272.6414763491.

The spelling of 20266361 in words is "twenty million, two hundred sixty-six thousand, three hundred sixty-one".