20711896 has 16 divisors (see below), whose sum is σ = 39738600. Its totient is φ = 10114944.

The previous prime is 20711893. The next prime is 20711909. The reversal of 20711896 is 69811702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711893) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 29761 + ... + 30448.

Almost surely, 2^20711896 is an apocalyptic number.

It is an amenable number.

20711896 is a deficient number, since it is larger than the sum of its proper divisors (19026704).

20711896 is a wasteful number, since it uses less digits than its factorization.

20711896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60258 (or 60254 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 20711896 is about 4551.0324103438. The cubic root of 20711896 is about 274.6249255806.

The spelling of 20711896 in words is "twenty million, seven hundred eleven thousand, eight hundred ninety-six".