20418207 has 16 divisors (see below), whose sum is σ = 29098080. Its totient is φ = 12690432.

The previous prime is 20418199. The next prime is 20418239. The reversal of 20418207 is 70281402.

It is not a de Polignac number, because 20418207 - 2³ = 20418199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20418247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3723 + ... + 7395.

It is an arithmetic number, because the mean of its divisors is an integer number (1818630).

Almost surely, 2^20418207 is an apocalyptic number.

20418207 is a deficient number, since it is larger than the sum of its proper divisors (8679873).

20418207 is a wasteful number, since it uses less digits than its factorization.

20418207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20418207 is about 4518.6510155134. The cubic root of 20418207 is about 273.3207061719.

Adding to 20418207 its reverse (70281402), we get a palindrome (90699609).

The spelling of 20418207 in words is "twenty million, four hundred eighteen thousand, two hundred seven".