18210843053 has 4 divisors (see below), whose sum is σ = 19611677148. Its totient is φ = 16810008960.

The previous prime is 18210843029. The next prime is 18210843073. The reversal of 18210843053 is 35034801281.

It is a happy number.

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 7347575524 + 10863267529 = 85718^2 + 104227^2 .

It is a cyclic number.

It is not a de Polignac number, because 18210843053 - 2²⁴ = 18194065837 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 (18210843073) 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, 700417028 + ... + 700417053.

It is an arithmetic number, because the mean of its divisors is an integer number (4902919287).

Almost surely, 2^18210843053 is an apocalyptic number.

18210843053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18210843053 is a deficient number, since it is larger than the sum of its proper divisors (1400834095).

18210843053 is a wasteful number, since it uses less digits than its factorization.

18210843053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400834094.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 18210843053 in words is "eighteen billion, two hundred ten million, eight hundred forty-three thousand, fifty-three".