18174615853 has 2 divisors, whose sum is σ = 18174615854. Its totient is φ = 18174615852.

The previous prime is 18174615817. The next prime is 18174615871. The reversal of 18174615853 is 35851647181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15345758884 + 2828856969 = 123878^2 + 53187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18174615853 is a prime.

It is a super-2 number, since 2×18174615853² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18174615797 and 18174615806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18174615553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9087307926 + 9087307927.

It is an arithmetic number, because the mean of its divisors is an integer number (9087307927).

Almost surely, 2^18174615853 is an apocalyptic number.

It is an amenable number.

18174615853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18174615853 is an equidigital number, since it uses as much as digits as its factorization.

18174615853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 49.

The spelling of 18174615853 in words is "eighteen billion, one hundred seventy-four million, six hundred fifteen thousand, eight hundred fifty-three".