20731084 has 12 divisors (see below), whose sum is σ = 39577608. Its totient is φ = 9423200.

The previous prime is 20731069. The next prime is 20731091. The reversal of 20731084 is 48013702.

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, 235537 + ... + 235624.

It is an arithmetic number, because the mean of its divisors is an integer number (3298134).

Almost surely, 2^20731084 is an apocalyptic number.

It is an amenable number.

20731084 is a deficient number, since it is larger than the sum of its proper divisors (18846524).

20731084 is a wasteful number, since it uses less digits than its factorization.

20731084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471176 (or 471174 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20731084 is about 4553.1400154179. The cubic root of 20731084 is about 274.7097057900.

Adding to 20731084 its reverse (48013702), we get a palindrome (68744786).

The spelling of 20731084 in words is "twenty million, seven hundred thirty-one thousand, eighty-four".