1820037816 has 192 divisors, whose sum is σ = 5653735200. Its totient is φ = 540546048.

The previous prime is 1820037809. The next prime is 1820037827. The reversal of 1820037816 is 6187300281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1324906 + ... + 1326278.

Almost surely, 2^1820037816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820037816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2826867600).

1820037816 is an abundant number, since it is smaller than the sum of its proper divisors (3833697384).

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

1820037816 is a wasteful number, since it uses less digits than its factorization.

1820037816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443 (or 1414 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1820037816 is about 42661.9012234570. The cubic root of 1820037816 is about 1220.9376058525.

The spelling of 1820037816 in words is "one billion, eight hundred twenty million, thirty-seven thousand, eight hundred sixteen".