1818996732 has 72 divisors (see below), whose sum is σ = 5286468096. Its totient is φ = 516589344.

The previous prime is 1818996731. The next prime is 1818996757. The reversal of 1818996732 is 2376998181.

It is a super-2 number, since 2×1818996732² = 6617498222053359648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818996731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20473 + ... + 63695.

It is an arithmetic number, because the mean of its divisors is an integer number (73423168).

Almost surely, 2^1818996732 is an apocalyptic number.

1818996732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818996732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2643234048).

1818996732 is an abundant number, since it is smaller than the sum of its proper divisors (3467471364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818996732 is a wasteful number, since it uses less digits than its factorization.

1818996732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43407 (or 43402 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1818996732 is about 42649.6979121775. The cubic root of 1818996732 is about 1220.7047643452.

It can be divided in two parts, 18189 and 96732, that added together give a square (114921 = 339²).

The spelling of 1818996732 in words is "one billion, eight hundred eighteen million, nine hundred ninety-six thousand, seven hundred thirty-two".