1818382913 has 2 divisors, whose sum is σ = 1818382914. Its totient is φ = 1818382912.

The previous prime is 1818382901. The next prime is 1818382919. The reversal of 1818382913 is 3192838181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1141966849 + 676416064 = 33793^2 + 26008^2 .

It is a cyclic number.

It is not a de Polignac number, because 1818382913 - 2¹⁶ = 1818317377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1818382919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909191456 + 909191457.

It is an arithmetic number, because the mean of its divisors is an integer number (909191457).

Almost surely, 2^1818382913 is an apocalyptic number.

It is an amenable number.

1818382913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818382913 is an equidigital number, since it uses as much as digits as its factorization.

1818382913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 44.

The square root of 1818382913 is about 42642.5012516855. The cubic root of 1818382913 is about 1220.5674402803.

The spelling of 1818382913 in words is "one billion, eight hundred eighteen million, three hundred eighty-two thousand, nine hundred thirteen".