1818522839 has 12 divisors (see below), whose sum is σ = 2151282600. Its totient is φ = 1532312208.

The previous prime is 1818522791. The next prime is 1818522863. The reversal of 1818522839 is 9382258181.

It is a de Polignac number, because none of the positive numbers 2^k-1818522839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1818522793 and 1818522802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818522239) 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 11 ways as a sum of consecutive naturals, for example, 311624 + ... + 317405.

It is an arithmetic number, because the mean of its divisors is an integer number (179273550).

Almost surely, 2^1818522839 is an apocalyptic number.

1818522839 is a deficient number, since it is larger than the sum of its proper divisors (332759761).

1818522839 is an equidigital number, since it uses as much as digits as its factorization.

1818522839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629102 (or 629095 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 1818522839 is about 42644.1419071835. The cubic root of 1818522839 is about 1220.5987473531.

The spelling of 1818522839 in words is "one billion, eight hundred eighteen million, five hundred twenty-two thousand, eight hundred thirty-nine".