18203458853 has 2 divisors, whose sum is σ = 18203458854. Its totient is φ = 18203458852.

The previous prime is 18203458807. The next prime is 18203458901. The reversal of 18203458853 is 35885430281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11570659489 + 6632799364 = 107567^2 + 81442^2 .

It is a cyclic number.

It is not a de Polignac number, because 18203458853 - 2⁶ = 18203458789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18203458798 and 18203458807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18203451853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101729426 + 9101729427.

It is an arithmetic number, because the mean of its divisors is an integer number (9101729427).

Almost surely, 2^18203458853 is an apocalyptic number.

It is an amenable number.

18203458853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18203458853 is an equidigital number, since it uses as much as digits as its factorization.

18203458853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 18203458853 in words is "eighteen billion, two hundred three million, four hundred fifty-eight thousand, eight hundred fifty-three".