20747266 has 4 divisors (see below), whose sum is σ = 31120902. Its totient is φ = 10373632.

The previous prime is 20747263. The next prime is 20747273. The reversal of 20747266 is 66274702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 8532241 = 3495^2 + 2921^2 .

It is not an unprimeable number, because it can be changed into a prime (20747263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5186815 + ... + 5186818.

Almost surely, 2^20747266 is an apocalyptic number.

20747266 is a deficient number, since it is larger than the sum of its proper divisors (10373636).

20747266 is a wasteful number, since it uses less digits than its factorization.

20747266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10373635.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20747266 is about 4554.9166841996. The cubic root of 20747266 is about 274.7811636441.

The spelling of 20747266 in words is "twenty million, seven hundred forty-seven thousand, two hundred sixty-six".