18500853 has 8 divisors (see below), whose sum is σ = 28191808. Its totient is φ = 10571904.

The previous prime is 18500849. The next prime is 18500863. The reversal of 18500853 is 35800581.

It is a happy number.

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

It is not a de Polignac number, because 18500853 - 2² = 18500849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18500853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500803) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 440476 + ... + 440517.

It is an arithmetic number, because the mean of its divisors is an integer number (3523976).

Almost surely, 2^18500853 is an apocalyptic number.

It is an amenable number.

18500853 is a deficient number, since it is larger than the sum of its proper divisors (9690955).

18500853 is an equidigital number, since it uses as much as digits as its factorization.

18500853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881003.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 18500853 is about 4301.2617916142. The cubic root of 18500853 is about 264.4826884419.

The spelling of 18500853 in words is "eighteen million, five hundred thousand, eight hundred fifty-three".