20670395 has 8 divisors (see below), whose sum is σ = 24830304. Its totient is φ = 16519104.

The previous prime is 20670379. The next prime is 20670421. The reversal of 20670395 is 59307602.

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

It is a cyclic number.

It is not a de Polignac number, because 20670395 - 2⁴ = 20670379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5807 + ... + 8663.

It is an arithmetic number, because the mean of its divisors is an integer number (3103788).

Almost surely, 2^20670395 is an apocalyptic number.

20670395 is a deficient number, since it is larger than the sum of its proper divisors (4159909).

20670395 is a wasteful number, since it uses less digits than its factorization.

20670395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20670395 is about 4546.4706091649. The cubic root of 20670395 is about 274.4413784084.

Adding to 20670395 its reverse (59307602), we get a palindrome (79977997).

The spelling of 20670395 in words is "twenty million, six hundred seventy thousand, three hundred ninety-five".