1821057336 has 128 divisors (see below), whose sum is σ = 5792486400. Its totient is φ = 519281280.

The previous prime is 1821057307. The next prime is 1821057373. The reversal of 1821057336 is 6337501281.

1821057336 is a `hidden beast` number, since 1 + 82 + 1 + 0 + 573 + 3 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1821057336.

It is a congruent number.

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 in 31 ways as a sum of consecutive naturals, for example, 1122606 + ... + 1124226.

It is an arithmetic number, because the mean of its divisors is an integer number (45253800).

Almost surely, 2^1821057336 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 1821057336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2896243200).

1821057336 is an abundant number, since it is smaller than the sum of its proper divisors (3971429064).

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

1821057336 is a wasteful number, since it uses less digits than its factorization.

1821057336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1821057336 is about 42673.8483851644. The cubic root of 1821057336 is about 1221.1655384709.

The spelling of 1821057336 in words is "one billion, eight hundred twenty-one million, fifty-seven thousand, three hundred thirty-six".