1820352961 has 8 divisors (see below), whose sum is σ = 2083114880. Its totient is φ = 1558268928.

The previous prime is 1820352959. The next prime is 1820352971. The reversal of 1820352961 is 1692530281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1820352961 - 2¹ = 1820352959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1820352961.

It is not an unprimeable number, because it can be changed into a prime (1820352971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163701 + ... + 174466.

It is an arithmetic number, because the mean of its divisors is an integer number (260389360).

Almost surely, 2^1820352961 is an apocalyptic number.

It is an amenable number.

1820352961 is a deficient number, since it is larger than the sum of its proper divisors (262761919).

1820352961 is an equidigital number, since it uses as much as digits as its factorization.

1820352961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338943.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1820352961 is about 42665.5945815829. The cubic root of 1820352961 is about 1221.0080714535.

The spelling of 1820352961 in words is "one billion, eight hundred twenty million, three hundred fifty-two thousand, nine hundred sixty-one".