1820541608453 has 2 divisors, whose sum is σ = 1820541608454. Its totient is φ = 1820541608452.

The previous prime is 1820541608437. The next prime is 1820541608489. The reversal of 1820541608453 is 3548061450281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1105395698884 + 715145909569 = 1051378^2 + 845663^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820541608453 - 2⁴ = 1820541608437 is a prime.

It is a super-2 number, since 2×1820541608453² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1820541608398 and 1820541608407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820541608153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910270804226 + 910270804227.

It is an arithmetic number, because the mean of its divisors is an integer number (910270804227).

Almost surely, 2^{1820541608453} is an apocalyptic number.

It is an amenable number.

1820541608453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820541608453 is an equidigital number, since it uses as much as digits as its factorization.

1820541608453 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 1820541608453 in words is "one trillion, eight hundred twenty billion, five hundred forty-one million, six hundred eight thousand, four hundred fifty-three".