20872066 has 8 divisors (see below), whose sum is σ = 31384080. Its totient is φ = 10410708.

The previous prime is 20872043. The next prime is 20872067. The reversal of 20872066 is 66027802.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20872067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11616 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (3923010).

Almost surely, 2^20872066 is an apocalyptic number.

20872066 is a deficient number, since it is larger than the sum of its proper divisors (10512014).

20872066 is a wasteful number, since it uses less digits than its factorization.

20872066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25328.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20872066 is about 4568.5956266669. The cubic root of 20872066 is about 275.3310217698.

Adding to 20872066 its reverse (66027802), we get a palindrome (86899868).

The spelling of 20872066 in words is "twenty million, eight hundred seventy-two thousand, sixty-six".