20162066 has 4 divisors (see below), whose sum is σ = 30243102. Its totient is φ = 10081032.

The previous prime is 20162063. The next prime is 20162069. The reversal of 20162066 is 66026102.

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

It is an interprime number because it is at equal distance from previous prime (20162063) and next prime (20162069).

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 172225 = 4471^2 + 415^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20162063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5040515 + ... + 5040518.

Almost surely, 2^20162066 is an apocalyptic number.

20162066 is a deficient number, since it is larger than the sum of its proper divisors (10081036).

20162066 is a wasteful number, since it uses less digits than its factorization.

20162066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10081035.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20162066 is about 4490.2189256204. The cubic root of 20162066 is about 272.1729814464.

Adding to 20162066 its reverse (66026102), we get a palindrome (86188168).

The spelling of 20162066 in words is "twenty million, one hundred sixty-two thousand, sixty-six".