18771841853 has 2 divisors, whose sum is σ = 18771841854. Its totient is φ = 18771841852.

The previous prime is 18771841831. The next prime is 18771841859. The reversal of 18771841853 is 35814817781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10209485764 + 8562356089 = 101042^2 + 92533^2 .

It is a cyclic number.

It is not a de Polignac number, because 18771841853 - 2¹⁴ = 18771825469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18771841795 and 18771841804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18771841859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9385920926 + 9385920927.

It is an arithmetic number, because the mean of its divisors is an integer number (9385920927).

Almost surely, 2^18771841853 is an apocalyptic number.

It is an amenable number.

18771841853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18771841853 is an equidigital number, since it uses as much as digits as its factorization.

18771841853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1505280, while the sum is 53.

The spelling of 18771841853 in words is "eighteen billion, seven hundred seventy-one million, eight hundred forty-one thousand, eight hundred fifty-three".