20631112 has 16 divisors (see below), whose sum is σ = 40719600. Its totient is φ = 9772560.

The previous prime is 20631103. The next prime is 20631113. The reversal of 20631112 is 21113602.

It is not an unprimeable number, because it can be changed into a prime (20631113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67714 + ... + 68017.

It is an arithmetic number, because the mean of its divisors is an integer number (2544975).

Almost surely, 2^20631112 is an apocalyptic number.

It is an amenable number.

20631112 is a deficient number, since it is larger than the sum of its proper divisors (20088488).

20631112 is a wasteful number, since it uses less digits than its factorization.

20631112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135756 (or 135752 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20631112 is about 4542.1483903545. The cubic root of 20631112 is about 274.2674143503.

Adding to 20631112 its reverse (21113602), we get a palindrome (41744714).

The spelling of 20631112 in words is "twenty million, six hundred thirty-one thousand, one hundred twelve".