20711944 has 32 divisors (see below), whose sum is σ = 42546240. Its totient is φ = 9374400.

The previous prime is 20711941. The next prime is 20711947. The reversal of 20711944 is 44911702.

It is an interprime number because it is at equal distance from previous prime (20711941) and next prime (20711947).

It is not an unprimeable number, because it can be changed into a prime (20711941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32509 + ... + 33139.

It is an arithmetic number, because the mean of its divisors is an integer number (1329570).

Almost surely, 2^20711944 is an apocalyptic number.

It is an amenable number.

20711944 is an abundant number, since it is smaller than the sum of its proper divisors (21834296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20711944 is a wasteful number, since it uses less digits than its factorization.

20711944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 20711944 is about 4551.0376838695. The cubic root of 20711944 is about 274.6251377289.

The spelling of 20711944 in words is "twenty million, seven hundred eleven thousand, nine hundred forty-four".