20407118 has 16 divisors (see below), whose sum is σ = 32624640. Its totient is φ = 9551256.

The previous prime is 20407117. The next prime is 20407129. The reversal of 20407118 is 81170402.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20407093 and 20407102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20407117) 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, 2558 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (2039040).

Almost surely, 2^20407118 is an apocalyptic number.

20407118 is a deficient number, since it is larger than the sum of its proper divisors (12217522).

20407118 is a wasteful number, since it uses less digits than its factorization.

20407118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20407118 is about 4517.4238233754. The cubic root of 20407118 is about 273.2712176255.

The spelling of 20407118 in words is "twenty million, four hundred seven thousand, one hundred eighteen".