20731044 has 12 divisors (see below), whose sum is σ = 48372464. Its totient is φ = 6910344.

The previous prime is 20731043. The next prime is 20731049. The reversal of 20731044 is 44013702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20731044.

It is not an unprimeable number, because it can be changed into a prime (20731043) 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, 863782 + ... + 863805.

Almost surely, 2^20731044 is an apocalyptic number.

It is an amenable number.

20731044 is an abundant number, since it is smaller than the sum of its proper divisors (27641420).

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

20731044 is a wasteful number, since it uses less digits than its factorization.

20731044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727594 (or 1727592 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20731044 is about 4553.1356228428. The cubic root of 20731044 is about 274.7095291086.

Adding to 20731044 its reverse (44013702), we get a palindrome (64744746).

The spelling of 20731044 in words is "twenty million, seven hundred thirty-one thousand, forty-four".