18429853 has 16 divisors (see below), whose sum is σ = 21273840. Its totient is φ = 15814656.

The previous prime is 18429839. The next prime is 18429857. The reversal of 18429853 is 35892481.

It can be written as a sum of positive squares in 8 ways, for example, as 4088484 + 14341369 = 2022^2 + 3787^2 .

It is not a de Polignac number, because 18429853 - 2¹⁷ = 18298781 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 (18429857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19201 + ... + 20137.

It is an arithmetic number, because the mean of its divisors is an integer number (1329615).

Almost surely, 2^18429853 is an apocalyptic number.

18429853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18429853 is a deficient number, since it is larger than the sum of its proper divisors (2843987).

18429853 is a wasteful number, since it uses less digits than its factorization.

18429853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its digits is 69120, while the sum is 40.

The square root of 18429853 is about 4293.0004658747. Note that the first 3 decimals coincide. The cubic root of 18429853 is about 264.1439230929.

The spelling of 18429853 in words is "eighteen million, four hundred twenty-nine thousand, eight hundred fifty-three".