20001266 has 8 divisors (see below), whose sum is σ = 30218160. Its totient is φ = 9928548.

The previous prime is 20001263. The next prime is 20001269. The reversal of 20001266 is 66210002.

It is an interprime number because it is at equal distance from previous prime (20001263) and next prime (20001269).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20001263) 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, 35696 + ... + 36251.

It is an arithmetic number, because the mean of its divisors is an integer number (3777270).

Almost surely, 2^20001266 is an apocalyptic number.

20001266 is a deficient number, since it is larger than the sum of its proper divisors (10216894).

20001266 is a wasteful number, since it uses less digits than its factorization.

20001266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72088.

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

The square root of 20001266 is about 4472.2774958627. The cubic root of 20001266 is about 271.4474889598.

Adding to 20001266 its reverse (66210002), we get a palindrome (86211268).

The spelling of 20001266 in words is "twenty million, one thousand, two hundred sixty-six".