20667268 has 6 divisors (see below), whose sum is σ = 36167726. Its totient is φ = 10333632.

The previous prime is 20667233. The next prime is 20667277. The reversal of 20667268 is 86276602.

It can be written as a sum of positive squares in only one way, i.e., 13527684 + 7139584 = 3678^2 + 2672^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583405 + ... + 2583412.

Almost surely, 2^20667268 is an apocalyptic number.

It is an amenable number.

20667268 is a deficient number, since it is larger than the sum of its proper divisors (15500458).

20667268 is a wasteful number, since it uses less digits than its factorization.

20667268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166821 (or 5166819 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 20667268 is about 4546.1267030297. The cubic root of 20667268 is about 274.4275386234.

The spelling of 20667268 in words is "twenty million, six hundred sixty-seven thousand, two hundred sixty-eight".