18838853 has 6 divisors (see below), whose sum is σ = 20707302. Its totient is φ = 17126120.

The previous prime is 18838847. The next prime is 18838889. The reversal of 18838853 is 35883881.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 2982529 = 3982^2 + 1727^2 .

It is not a de Polignac number, because 18838853 - 2⁶ = 18838789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18838843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77726 + ... + 77967.

It is an arithmetic number, because the mean of its divisors is an integer number (3451217).

Almost surely, 2^18838853 is an apocalyptic number.

It is an amenable number.

18838853 is a deficient number, since it is larger than the sum of its proper divisors (1868449).

18838853 is a wasteful number, since it uses less digits than its factorization.

18838853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155715 (or 155704 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 18838853 is about 4340.3747534055. The cubic root of 18838853 is about 266.0836273888.

It can be divided in two parts, 18838 and 853, that added together give a palindrome (19691).

The spelling of 18838853 in words is "eighteen million, eight hundred thirty-eight thousand, eight hundred fifty-three".