1819920512 has 16 divisors (see below), whose sum is σ = 3625623150. Its totient is φ = 909960192.

The previous prime is 1819920481. The next prime is 1819920523. The reversal of 1819920512 is 2150299181.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1090056256 + 729864256 = 33016^2 + 27016^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-3 number, since 3×1819920512³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7108937 + ... + 7109192.

Almost surely, 2^1819920512 is an apocalyptic number.

It is an amenable number.

1819920512 is a deficient number, since it is larger than the sum of its proper divisors (1805702638).

1819920512 is an equidigital number, since it uses as much as digits as its factorization.

1819920512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14218143 (or 14218131 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 1819920512 is about 42660.5263915015. The cubic root of 1819920512 is about 1220.9113749063.

The spelling of 1819920512 in words is "one billion, eight hundred nineteen million, nine hundred twenty thousand, five hundred twelve".