20100266 has 4 divisors (see below), whose sum is σ = 30150402. Its totient is φ = 10050132.

The previous prime is 20100263. The next prime is 20100281. The reversal of 20100266 is 66200102.

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., 19545241 + 555025 = 4421^2 + 745^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20100263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025065 + ... + 5025068.

Almost surely, 2^20100266 is an apocalyptic number.

20100266 is a deficient number, since it is larger than the sum of its proper divisors (10050136).

20100266 is a wasteful number, since it uses less digits than its factorization.

20100266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050135.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20100266 is about 4483.3320198263. The cubic root of 20100266 is about 271.8946120701.

Adding to 20100266 its reverse (66200102), we get a palindrome (86300368).

The spelling of 20100266 in words is "twenty million, one hundred thousand, two hundred sixty-six".