20761266 has 16 divisors (see below), whose sum is σ = 42306624. Its totient is φ = 6789744.

The previous prime is 20761253. The next prime is 20761271. The reversal of 20761266 is 66216702.

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 7 ways as a sum of consecutive naturals, for example, 32326 + ... + 32961.

It is an arithmetic number, because the mean of its divisors is an integer number (2644164).

Almost surely, 2^20761266 is an apocalyptic number.

20761266 is an abundant number, since it is smaller than the sum of its proper divisors (21545358).

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

20761266 is a wasteful number, since it uses less digits than its factorization.

20761266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65345.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20761266 is about 4556.4532259204. The cubic root of 20761266 is about 274.8429560642.

Adding to 20761266 its reverse (66216702), we get a palindrome (86977968).

The spelling of 20761266 in words is "twenty million, seven hundred sixty-one thousand, two hundred sixty-six".