20741306 has 4 divisors (see below), whose sum is σ = 31111962. Its totient is φ = 10370652.

The previous prime is 20741297. The next prime is 20741311. The reversal of 20741306 is 60314702.

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., 11162281 + 9579025 = 3341^2 + 3095^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5185325 + ... + 5185328.

Almost surely, 2^20741306 is an apocalyptic number.

20741306 is a deficient number, since it is larger than the sum of its proper divisors (10370656).

20741306 is a wasteful number, since it uses less digits than its factorization.

20741306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10370655.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20741306 is about 4554.2623991158. The cubic root of 20741306 is about 274.7548492922.

The spelling of 20741306 in words is "twenty million, seven hundred forty-one thousand, three hundred six".