20765956 has 6 divisors (see below), whose sum is σ = 36340430. Its totient is φ = 10382976.

The previous prime is 20765929. The next prime is 20765957. The reversal of 20765956 is 65956702.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 695556 = 4480^2 + 834^2 .

It is not an unprimeable number, because it can be changed into a prime (20765957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595741 + ... + 2595748.

Almost surely, 2^20765956 is an apocalyptic number.

It is an amenable number.

20765956 is a deficient number, since it is larger than the sum of its proper divisors (15574474).

20765956 is a wasteful number, since it uses less digits than its factorization.

20765956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191493 (or 5191491 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 20765956 is about 4556.9678515434. The cubic root of 20765956 is about 274.8636503130.

The spelling of 20765956 in words is "twenty million, seven hundred sixty-five thousand, nine hundred fifty-six".