18490853 has 4 divisors (see below), whose sum is σ = 18546060. Its totient is φ = 18435648.

The previous prime is 18490847. The next prime is 18490891. The reversal of 18490853 is 35809481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3265249 + 15225604 = 1807^2 + 3902^2 .

It is a cyclic number.

It is not a de Polignac number, because 18490853 - 2⁶ = 18490789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18492853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27098 + ... + 27771.

It is an arithmetic number, because the mean of its divisors is an integer number (4636515).

Almost surely, 2^18490853 is an apocalyptic number.

It is an amenable number.

18490853 is a deficient number, since it is larger than the sum of its proper divisors (55207).

18490853 is an equidigital number, since it uses as much as digits as its factorization.

18490853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55206.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18490853 is about 4300.0991849026. The cubic root of 18490853 is about 264.4350275124.

The spelling of 18490853 in words is "eighteen million, four hundred ninety thousand, eight hundred fifty-three".