20765312 has 16 divisors (see below), whose sum is σ = 41368650. Its totient is φ = 10382592.

The previous prime is 20765293. The next prime is 20765321. The reversal of 20765312 is 21356702.

It can be written as a sum of positive squares in only one way, i.e., 11669056 + 9096256 = 3416^2 + 3016^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80987 + ... + 81242.

Almost surely, 2^20765312 is an apocalyptic number.

It is an amenable number.

20765312 is a deficient number, since it is larger than the sum of its proper divisors (20603338).

20765312 is an equidigital number, since it uses as much as digits as its factorization.

20765312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162243 (or 162231 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20765312 is about 4556.8971899748. The cubic root of 20765312 is about 274.8608088992.

The spelling of 20765312 in words is "twenty million, seven hundred sixty-five thousand, three hundred twelve".