1830648353021 has 4 divisors (see below), whose sum is σ = 1830652054812. Its totient is φ = 1830644651232.

The previous prime is 1830648352991. The next prime is 1830648353057. The reversal of 1830648353021 is 1203538460381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1316953627396 + 513694725625 = 1147586^2 + 716725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1830648353021 - 2¹⁴ = 1830648336637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830648355021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969050 + ... + 2144843.

It is an arithmetic number, because the mean of its divisors is an integer number (457663013703).

Almost surely, 2^{1830648353021} is an apocalyptic number.

It is an amenable number.

1830648353021 is a deficient number, since it is larger than the sum of its proper divisors (3701791).

1830648353021 is an equidigital number, since it uses as much as digits as its factorization.

1830648353021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701790.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 1830648353021 in words is "one trillion, eight hundred thirty billion, six hundred forty-eight million, three hundred fifty-three thousand, twenty-one".