20726306 has 8 divisors (see below), whose sum is σ = 31515564. Its totient is φ = 10221120.

The previous prime is 20726291. The next prime is 20726317. The reversal of 20726306 is 60362702.

It can be written as a sum of positive squares in 2 ways, for example, as 20620681 + 105625 = 4541^2 + 325^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70835 + ... + 71126.

Almost surely, 2^20726306 is an apocalyptic number.

20726306 is a deficient number, since it is larger than the sum of its proper divisors (10789258).

20726306 is a wasteful number, since it uses less digits than its factorization.

20726306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142036.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20726306 is about 4552.6152923347. The cubic root of 20726306 is about 274.6885995802.

The spelling of 20726306 in words is "twenty million, seven hundred twenty-six thousand, three hundred six".