20118406 has 16 divisors (see below), whose sum is σ = 37624320. Its totient is φ = 7838280.

The previous prime is 20118401. The next prime is 20118419. The reversal of 20118406 is 60481102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20118401) 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, 65166 + ... + 65473.

It is an arithmetic number, because the mean of its divisors is an integer number (2351520).

Almost surely, 2^20118406 is an apocalyptic number.

20118406 is a deficient number, since it is larger than the sum of its proper divisors (17505914).

20118406 is a wasteful number, since it uses less digits than its factorization.

20118406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130659.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20118406 is about 4485.3546125139. The cubic root of 20118406 is about 271.9763802298.

Adding to 20118406 its reverse (60481102), we get a palindrome (80599508).

The spelling of 20118406 in words is "twenty million, one hundred eighteen thousand, four hundred six".