1818181853 has 4 divisors (see below), whose sum is σ = 1835834208. Its totient is φ = 1800529500.

The previous prime is 1818181831. The next prime is 1818181889. The reversal of 1818181853 is 3581818181.

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 1818181853 - 2¹⁶ = 1818116317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818181823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8826023 + ... + 8826228.

It is an arithmetic number, because the mean of its divisors is an integer number (458958552).

Almost surely, 2^1818181853 is an apocalyptic number.

It is an amenable number.

1818181853 is a deficient number, since it is larger than the sum of its proper divisors (17652355).

1818181853 is a wasteful number, since it uses less digits than its factorization.

1818181853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652354.

The product of its digits is 61440, while the sum is 44.

The square root of 1818181853 is about 42640.1436794015. The cubic root of 1818181853 is about 1220.5224522613.

The spelling of 1818181853 in words is "one billion, eight hundred eighteen million, one hundred eighty-one thousand, eight hundred fifty-three".