20731112 has 8 divisors (see below), whose sum is σ = 38870850. Its totient is φ = 10365552.

The previous prime is 20731097. The next prime is 20731121. The reversal of 20731112 is 21113702.

It can be written as a sum of positive squares in only one way, i.e., 15413476 + 5317636 = 3926^2 + 2306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1295687 + ... + 1295702.

Almost surely, 2^20731112 is an apocalyptic number.

It is an amenable number.

20731112 is a deficient number, since it is larger than the sum of its proper divisors (18139738).

20731112 is a wasteful number, since it uses less digits than its factorization.

20731112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591395 (or 2591391 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 20731112 is about 4553.1430902180. The cubic root of 20731112 is about 274.7098294669.

Adding to 20731112 its reverse (21113702), we get a palindrome (41844814).

The spelling of 20731112 in words is "twenty million, seven hundred thirty-one thousand, one hundred twelve".