20151118 has 8 divisors (see below), whose sum is σ = 32551848. Its totient is φ = 9300504.

The previous prime is 20151097. The next prime is 20151127. The reversal of 20151118 is 81115102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20151095 and 20151104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387496 + ... + 387547.

It is an arithmetic number, because the mean of its divisors is an integer number (4068981).

Almost surely, 2^20151118 is an apocalyptic number.

20151118 is a deficient number, since it is larger than the sum of its proper divisors (12400730).

20151118 is a wasteful number, since it uses less digits than its factorization.

20151118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775058.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 20151118 is about 4488.9996658498. Note that the first 3 decimals coincide. The cubic root of 20151118 is about 272.1237092257.

The spelling of 20151118 in words is "twenty million, one hundred fifty-one thousand, one hundred eighteen".