20380066 has 16 divisors (see below), whose sum is σ = 34995456. Its totient is φ = 8719776.

The previous prime is 20380049. The next prime is 20380079. The reversal of 20380066 is 66008302.

It is a super-3 number, since 3×20380066³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20380066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14695 + ... + 16021.

It is an arithmetic number, because the mean of its divisors is an integer number (2187216).

Almost surely, 2^20380066 is an apocalyptic number.

20380066 is a deficient number, since it is larger than the sum of its proper divisors (14615390).

20380066 is a wasteful number, since it uses less digits than its factorization.

20380066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20380066 is about 4514.4286460193. The cubic root of 20380066 is about 273.1504133398.

Adding to 20380066 its reverse (66008302), we get a palindrome (86388368).

The spelling of 20380066 in words is "twenty million, three hundred eighty thousand, sixty-six".