20660170 has 8 divisors (see below), whose sum is σ = 37188324. Its totient is φ = 8264064.

The previous prime is 20660161. The next prime is 20660173. The reversal of 20660170 is 7106602.

It can be written as a sum of positive squares in 2 ways, for example, as 20277009 + 383161 = 4503^2 + 619^2 .

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 (20660173) 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, 1032999 + ... + 1033018.

Almost surely, 2^20660170 is an apocalyptic number.

20660170 is a deficient number, since it is larger than the sum of its proper divisors (16528154).

20660170 is a wasteful number, since it uses less digits than its factorization.

20660170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066024.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20660170 is about 4545.3459714306. The cubic root of 20660170 is about 274.3961184133.

Adding to 20660170 its reverse (7106602), we get a palindrome (27766772).

The spelling of 20660170 in words is "twenty million, six hundred sixty thousand, one hundred seventy".