1821286053 has 20 divisors (see below), whose sum is σ = 2808454528. Its totient is φ = 1175021640.

The previous prime is 1821286037. The next prime is 1821286063. The reversal of 1821286053 is 3506821281.

It is a happy number.

1821286053 is a `hidden beast` number, since 1 + 8 + 21 + 28 + 605 + 3 = 666.

It is not a de Polignac number, because 1821286053 - 2⁴ = 1821286037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1821285999 and 1821286017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821286013) 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 19 ways as a sum of consecutive naturals, for example, 360151 + ... + 365172.

Almost surely, 2^1821286053 is an apocalyptic number.

It is an amenable number.

1821286053 is a deficient number, since it is larger than the sum of its proper divisors (987168475).

1821286053 is an equidigital number, since it uses as much as digits as its factorization.

1821286053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725366 (or 725357 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1821286053 is about 42676.5281272973. The cubic root of 1821286053 is about 1221.2166607174.

The spelling of 1821286053 in words is "one billion, eight hundred twenty-one million, two hundred eighty-six thousand, fifty-three".