20670115 has 4 divisors (see below), whose sum is σ = 24804144. Its totient is φ = 16536088.

The previous prime is 20670061. The next prime is 20670137. The reversal of 20670115 is 51107602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20670115 is a prime.

It is a super-2 number, since 2×20670115² = 854507308226450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067007 + ... + 2067016.

It is an arithmetic number, because the mean of its divisors is an integer number (6201036).

Almost surely, 2^20670115 is an apocalyptic number.

20670115 is a deficient number, since it is larger than the sum of its proper divisors (4134029).

20670115 is an equidigital number, since it uses as much as digits as its factorization.

20670115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134028.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 20670115 is about 4546.4398159439. The cubic root of 20670115 is about 274.4401392137.

Adding to 20670115 its reverse (51107602), we get a palindrome (71777717).

The spelling of 20670115 in words is "twenty million, six hundred seventy thousand, one hundred fifteen".