1801824218851 has 4 divisors (see below), whose sum is σ = 1819664062704. Its totient is φ = 1783984375000.

The previous prime is 1801824218839. The next prime is 1801824218897. The reversal of 1801824218851 is 1588124281081.

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

It is a cyclic number.

It is not a de Polignac number, because 1801824218851 - 2¹⁵ = 1801824186083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1801824218795 and 1801824218804.

It is not an unprimeable number, because it can be changed into a prime (1801824213851) 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, 8919921775 + ... + 8919921976.

It is an arithmetic number, because the mean of its divisors is an integer number (454916015676).

Almost surely, 2^{1801824218851} is an apocalyptic number.

1801824218851 is a deficient number, since it is larger than the sum of its proper divisors (17839843853).

1801824218851 is a wasteful number, since it uses less digits than its factorization.

1801824218851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17839843852.

The product of its (nonzero) digits is 327680, while the sum is 49.

The spelling of 1801824218851 in words is "one trillion, eight hundred one billion, eight hundred twenty-four million, two hundred eighteen thousand, eight hundred fifty-one".