20673265 has 8 divisors (see below), whose sum is σ = 24883560. Its totient is φ = 16488192.

The previous prime is 20673253. The next prime is 20673271. The reversal of 20673265 is 56237602.

It can be written as a sum of positive squares in 4 ways, for example, as 4359744 + 16313521 = 2088^2 + 4039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20673265 - 2⁷ = 20673137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4450 + ... + 7819.

It is an arithmetic number, because the mean of its divisors is an integer number (3110445).

Almost surely, 2^20673265 is an apocalyptic number.

It is an amenable number.

20673265 is a deficient number, since it is larger than the sum of its proper divisors (4210295).

20673265 is a wasteful number, since it uses less digits than its factorization.

20673265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20673265 is about 4546.7862276557. The cubic root of 20673265 is about 274.4540795091.

The spelling of 20673265 in words is "twenty million, six hundred seventy-three thousand, two hundred sixty-five".