20206066 has 4 divisors (see below), whose sum is σ = 30309102. Its totient is φ = 10103032.

The previous prime is 20206049. The next prime is 20206097. The reversal of 20206066 is 66060202.

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., 19989841 + 216225 = 4471^2 + 465^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051515 + ... + 5051518.

Almost surely, 2^20206066 is an apocalyptic number.

20206066 is a deficient number, since it is larger than the sum of its proper divisors (10103036).

20206066 is a wasteful number, since it uses less digits than its factorization.

20206066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10103035.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20206066 is about 4495.1157938367. The cubic root of 20206066 is about 272.3708267500.

Adding to 20206066 its reverse (66060202), we get a palindrome (86266268).

The spelling of 20206066 in words is "twenty million, two hundred six thousand, sixty-six".