20161266 has 8 divisors (see below), whose sum is σ = 40322544. Its totient is φ = 6720420.

The previous prime is 20161243. The next prime is 20161277. The reversal of 20161266 is 66216102.

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

20161266 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1680100 + ... + 1680111.

It is an arithmetic number, because the mean of its divisors is an integer number (5040318).

Almost surely, 2^20161266 is an apocalyptic number.

20161266 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20161266 is a wasteful number, since it uses less digits than its factorization.

20161266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360216.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20161266 is about 4490.1298422206. The cubic root of 20161266 is about 272.1693815960.

Adding to 20161266 its reverse (66216102), we get a palindrome (86377368).

The spelling of 20161266 in words is "twenty million, one hundred sixty-one thousand, two hundred sixty-six".