20671007 has 8 divisors (see below), whose sum is σ = 24070176. Its totient is φ = 17383392.

The previous prime is 20670989. The next prime is 20671019. The reversal of 20671007 is 70017602.

It is a happy number.

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 20671007 - 2⁶ = 20670943 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 (20671097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27488 + ... + 28229.

It is an arithmetic number, because the mean of its divisors is an integer number (3008772).

Almost surely, 2^20671007 is an apocalyptic number.

20671007 is a deficient number, since it is larger than the sum of its proper divisors (3399169).

20671007 is an equidigital number, since it uses as much as digits as its factorization.

20671007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55777.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 20671007 is about 4546.5379136217. The cubic root of 20671007 is about 274.4440868950. Note that the first 3 decimals are identical.

Adding to 20671007 its reverse (70017602), we get a palindrome (90688609).

The spelling of 20671007 in words is "twenty million, six hundred seventy-one thousand, seven".