20673908 has 6 divisors (see below), whose sum is σ = 36179346. Its totient is φ = 10336952.

The previous prime is 20673907. The next prime is 20673943. The reversal of 20673908 is 80937602.

It can be written as a sum of positive squares in only one way, i.e., 10510564 + 10163344 = 3242^2 + 3188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584235 + ... + 2584242.

It is an arithmetic number, because the mean of its divisors is an integer number (6029891).

Almost surely, 2^20673908 is an apocalyptic number.

It is an amenable number.

20673908 is a deficient number, since it is larger than the sum of its proper divisors (15505438).

20673908 is a wasteful number, since it uses less digits than its factorization.

20673908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168481 (or 5168479 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20673908 is about 4546.8569363902. The cubic root of 20673908 is about 274.4569249255.

The spelling of 20673908 in words is "twenty million, six hundred seventy-three thousand, nine hundred eight".