20118105 has 64 divisors (see below), whose sum is σ = 41664000. Its totient is φ = 9020160.

The previous prime is 20118103. The next prime is 20118107. The reversal of 20118105 is 50181102.

It is an interprime number because it is at equal distance from previous prime (20118103) and next prime (20118107).

It is not a de Polignac number, because 20118105 - 2¹ = 20118103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20118103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57471 + ... + 57819.

It is an arithmetic number, because the mean of its divisors is an integer number (651000).

Almost surely, 2^20118105 is an apocalyptic number.

It is an amenable number.

20118105 is an abundant number, since it is smaller than the sum of its proper divisors (21545895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20118105 is a wasteful number, since it uses less digits than its factorization.

20118105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 20118105 is about 4485.3210587426. The cubic root of 20118105 is about 271.9750238384.

Adding to 20118105 its reverse (50181102), we get a palindrome (70299207).

The spelling of 20118105 in words is "twenty million, one hundred eighteen thousand, one hundred five".