18619341453 has 20 divisors (see below), whose sum is σ = 28773187740. Its totient is φ = 11984861952.

The previous prime is 18619341449. The next prime is 18619341487. The reversal of 18619341453 is 35414391681.

18619341453 is a `hidden beast` number, since 1 + 8 + 6 + 193 + 4 + 1 + 453 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4220061444 + 14399280009 = 64962^2 + 119997^2 .

It is not a de Polignac number, because 18619341453 - 2² = 18619341449 is a prime.

It is a super-2 number, since 2×18619341453² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18619341399 and 18619341408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18619351453) 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 19 ways as a sum of consecutive naturals, for example, 3960900 + ... + 3965597.

It is an arithmetic number, because the mean of its divisors is an integer number (1438659387).

Almost surely, 2^18619341453 is an apocalyptic number.

It is an amenable number.

18619341453 is a deficient number, since it is larger than the sum of its proper divisors (10153846287).

18619341453 is an equidigital number, since it uses as much as digits as its factorization.

18619341453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7926538 (or 7926529 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 18619341453 in words is "eighteen billion, six hundred nineteen million, three hundred forty-one thousand, four hundred fifty-three".