20318266 has 4 divisors (see below), whose sum is σ = 30477402. Its totient is φ = 10159132.

The previous prime is 20318261. The next prime is 20318293. The reversal of 20318266 is 66281302.

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., 12075625 + 8242641 = 3475^2 + 2871^2 .

It is not an unprimeable number, because it can be changed into a prime (20318261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5079565 + ... + 5079568.

Almost surely, 2^20318266 is an apocalyptic number.

20318266 is a deficient number, since it is larger than the sum of its proper divisors (10159136).

20318266 is a wasteful number, since it uses less digits than its factorization.

20318266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10159135.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20318266 is about 4507.5787292071. The cubic root of 20318266 is about 272.8740356412.

Adding to 20318266 its reverse (66281302), we get a palindrome (86599568).

The spelling of 20318266 in words is "twenty million, three hundred eighteen thousand, two hundred sixty-six".