20707207 has 8 divisors (see below), whose sum is σ = 23079600. Its totient is φ = 18463104.

The previous prime is 20707187. The next prime is 20707229. The reversal of 20707207 is 70270702.

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 20707207 - 2¹⁵ = 20674439 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 (20707237) by changing a digit.

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, 31732 + ... + 32377.

It is an arithmetic number, because the mean of its divisors is an integer number (2884950).

Almost surely, 2^20707207 is an apocalyptic number.

20707207 is a deficient number, since it is larger than the sum of its proper divisors (2372393).

20707207 is a wasteful number, since it uses less digits than its factorization.

20707207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64145.

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 20707207 is about 4550.5172233495. The cubic root of 20707207 is about 274.6041997545.

Adding to 20707207 its reverse (70270702), we get a palindrome (90977909).

The spelling of 20707207 in words is "twenty million, seven hundred seven thousand, two hundred seven".