20110207 has 4 divisors (see below), whose sum is σ = 21657160. Its totient is φ = 18563256.

The previous prime is 20110183. The next prime is 20110217. The reversal of 20110207 is 70201102.

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

It is a cyclic number.

It is not a de Polignac number, because 20110207 - 2¹¹ = 20108159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1546939 = 20110207 / (2 + 0 + 1 + 1 + 0 + 2 + 0 + 7).

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110217) 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 3 ways as a sum of consecutive naturals, for example, 773457 + ... + 773482.

It is an arithmetic number, because the mean of its divisors is an integer number (5414290).

Almost surely, 2^20110207 is an apocalyptic number.

20110207 is a deficient number, since it is larger than the sum of its proper divisors (1546953).

20110207 is a wasteful number, since it uses less digits than its factorization.

20110207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546952.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20110207 is about 4484.4405448172. The cubic root of 20110207 is about 271.9394283736.

Adding to 20110207 its reverse (70201102), we get a palindrome (90311309).

The spelling of 20110207 in words is "twenty million, one hundred ten thousand, two hundred seven".