20812118 has 8 divisors (see below), whose sum is σ = 31331712. Its totient is φ = 10368216.

The previous prime is 20812091. The next prime is 20812123. The reversal of 20812118 is 81121802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20812093 and 20812102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18230 + ... + 19337.

It is an arithmetic number, because the mean of its divisors is an integer number (3916464).

Almost surely, 2^20812118 is an apocalyptic number.

20812118 is a deficient number, since it is larger than the sum of its proper divisors (10519594).

20812118 is a wasteful number, since it uses less digits than its factorization.

20812118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37846.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 20812118 is about 4562.0300305895. The cubic root of 20812118 is about 275.0671703688.

The spelling of 20812118 in words is "twenty million, eight hundred twelve thousand, one hundred eighteen".