20670167 has 4 divisors (see below), whose sum is σ = 23623056. Its totient is φ = 17717280.

The previous prime is 20670163. The next prime is 20670173. The reversal of 20670167 is 76107602.

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

It is not a de Polignac number, because 20670167 - 2² = 20670163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670163) 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, 1476434 + ... + 1476447.

It is an arithmetic number, because the mean of its divisors is an integer number (5905764).

Almost surely, 2^20670167 is an apocalyptic number.

20670167 is a deficient number, since it is larger than the sum of its proper divisors (2952889).

20670167 is an equidigital number, since it uses as much as digits as its factorization.

20670167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952888.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20670167 is about 4546.4455347007. The cubic root of 20670167 is about 274.4403693507.

Adding to 20670167 its reverse (76107602), we get a palindrome (96777769).

The spelling of 20670167 in words is "twenty million, six hundred seventy thousand, one hundred sixty-seven".