18856853 has 4 divisors (see below), whose sum is σ = 19084128. Its totient is φ = 18629580.

The previous prime is 18856841. The next prime is 18856867. The reversal of 18856853 is 35865881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18856853 - 2¹⁶ = 18791317 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 (18856883) 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, 113513 + ... + 113678.

It is an arithmetic number, because the mean of its divisors is an integer number (4771032).

Almost surely, 2^18856853 is an apocalyptic number.

It is an amenable number.

18856853 is a deficient number, since it is larger than the sum of its proper divisors (227275).

18856853 is an equidigital number, since it uses as much as digits as its factorization.

18856853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227274.

The product of its digits is 230400, while the sum is 44.

The square root of 18856853 is about 4342.4478120065. The cubic root of 18856853 is about 266.1683455807.

Subtracting 18856853 from its reverse (35865881), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 18856853 in words is "eighteen million, eight hundred fifty-six thousand, eight hundred fifty-three".