20706944 has 16 divisors (see below), whose sum is σ = 41252370. Its totient is φ = 10353408.

The previous prime is 20706929. The next prime is 20706947. The reversal of 20706944 is 44960702.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 9684544 = 3320^2 + 3112^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20706944.

It is not an unprimeable number, because it can be changed into a prime (20706947) by changing a digit.

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 as a sum of consecutive naturals, namely, 80759 + ... + 81014.

Almost surely, 2^20706944 is an apocalyptic number.

It is an amenable number.

20706944 is a deficient number, since it is larger than the sum of its proper divisors (20545426).

20706944 is an equidigital number, since it uses as much as digits as its factorization.

20706944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161787 (or 161775 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20706944 is about 4550.4883254438. The cubic root of 20706944 is about 274.6030371768.

The spelling of 20706944 in words is "twenty million, seven hundred six thousand, nine hundred forty-four".