20673269 has 6 divisors (see below), whose sum is σ = 21248514. Its totient is φ = 20113200.

The previous prime is 20673253. The next prime is 20673271. The reversal of 20673269 is 96237602.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7263025 + 13410244 = 2695^2 + 3662^2 .

It is not a de Polignac number, because 20673269 - 2⁴ = 20673253 is a prime.

It is a super-2 number, since 2×20673269² = 854768102292722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6182 + ... + 8919.

It is an arithmetic number, because the mean of its divisors is an integer number (3541419).

Almost surely, 2^20673269 is an apocalyptic number.

It is an amenable number.

20673269 is a deficient number, since it is larger than the sum of its proper divisors (575245).

20673269 is an equidigital number, since it uses as much as digits as its factorization.

20673269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15175 (or 15138 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20673269 is about 4546.7866675269. The cubic root of 20673269 is about 274.4540972102.

The spelling of 20673269 in words is "twenty million, six hundred seventy-three thousand, two hundred sixty-nine".