1821358163 has 2 divisors, whose sum is σ = 1821358164. Its totient is φ = 1821358162.

The previous prime is 1821358151. The next prime is 1821358171. The reversal of 1821358163 is 3618531281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1821358163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1821358463) 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 as a sum of consecutive naturals, namely, 910679081 + 910679082.

It is an arithmetic number, because the mean of its divisors is an integer number (910679082).

Almost surely, 2^1821358163 is an apocalyptic number.

1821358163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821358163 is an equidigital number, since it uses as much as digits as its factorization.

1821358163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 1821358163 is about 42677.3729627305. The cubic root of 1821358163 is about 1221.2327776752.

The spelling of 1821358163 in words is "one billion, eight hundred twenty-one million, three hundred fifty-eight thousand, one hundred sixty-three".