20672116 has 12 divisors (see below), whose sum is σ = 36386532. Its totient is φ = 10275968.

The previous prime is 20672083. The next prime is 20672123. The reversal of 20672116 is 61127602.

It can be written as a sum of positive squares in 2 ways, for example, as 19395216 + 1276900 = 4404^2 + 1130^2 .

It is a congruent number.

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, 14245 + ... + 15628.

It is an arithmetic number, because the mean of its divisors is an integer number (3032211).

Almost surely, 2^20672116 is an apocalyptic number.

It is an amenable number.

20672116 is a deficient number, since it is larger than the sum of its proper divisors (15714416).

20672116 is a wasteful number, since it uses less digits than its factorization.

20672116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30050 (or 30048 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20672116 is about 4546.6598729177. The cubic root of 20672116 is about 274.4489947845.

Adding to 20672116 its reverse (61127602), we get a palindrome (81799718).

The spelling of 20672116 in words is "twenty million, six hundred seventy-two thousand, one hundred sixteen".