1808084227421 has 4 divisors (see below), whose sum is σ = 1903246555200. Its totient is φ = 1712921899644.

The previous prime is 1808084227321. The next prime is 1808084227457. The reversal of 1808084227421 is 1247224808081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1808084227421 - 2³⁴ = 1790904358237 is a prime.

It is a super-2 number, since 2×1808084227421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808084227321) 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, 47581163861 + ... + 47581163898.

It is an arithmetic number, because the mean of its divisors is an integer number (475811638800).

Almost surely, 2^{1808084227421} is an apocalyptic number.

It is an amenable number.

1808084227421 is a deficient number, since it is larger than the sum of its proper divisors (95162327779).

1808084227421 is an equidigital number, since it uses as much as digits as its factorization.

1808084227421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95162327778.

The product of its (nonzero) digits is 458752, while the sum is 47.

The spelling of 1808084227421 in words is "one trillion, eight hundred eight billion, eighty-four million, two hundred twenty-seven thousand, four hundred twenty-one".