20740768 has 24 divisors (see below), whose sum is σ = 40939668. Its totient is φ = 10343424.

The previous prime is 20740747. The next prime is 20740777. The reversal of 20740768 is 86704702.

It can be written as a sum of positive squares in 2 ways, for example, as 17740944 + 2999824 = 4212^2 + 1732^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18430 + ... + 19522.

Almost surely, 2^20740768 is an apocalyptic number.

It is an amenable number.

20740768 is a deficient number, since it is larger than the sum of its proper divisors (20198900).

20740768 is a wasteful number, since it uses less digits than its factorization.

20740768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20740768 is about 4554.2033331857. The cubic root of 20740768 is about 274.7524736882.

The spelling of 20740768 in words is "twenty million, seven hundred forty thousand, seven hundred sixty-eight".