20670568 has 16 divisors (see below), whose sum is σ = 39805380. Its totient is φ = 10055808.

The previous prime is 20670563. The next prime is 20670577. The reversal of 20670568 is 86507602.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 40804 = 4542^2 + 202^2 .

It is not an unprimeable number, because it can be changed into a prime (20670563) 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, 34621 + ... + 35212.

Almost surely, 2^20670568 is an apocalyptic number.

It is an amenable number.

20670568 is a deficient number, since it is larger than the sum of its proper divisors (19134812).

20670568 is a wasteful number, since it uses less digits than its factorization.

20670568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69876 (or 69872 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20670568 is about 4546.4896348722. The cubic root of 20670568 is about 274.4421440481.

The spelling of 20670568 in words is "twenty million, six hundred seventy thousand, five hundred sixty-eight".