1841938421 has 4 divisors (see below), whose sum is σ = 1848493644. Its totient is φ = 1835383200.

The previous prime is 1841938379. The next prime is 1841938429. The reversal of 1841938421 is 1248391481.

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 1572519025 + 269419396 = 39655^2 + 16414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1841938421 - 2¹⁰ = 1841937397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1841938429) 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, 3277190 + ... + 3277751.

It is an arithmetic number, because the mean of its divisors is an integer number (462123411).

Almost surely, 2^1841938421 is an apocalyptic number.

It is an amenable number.

1841938421 is a deficient number, since it is larger than the sum of its proper divisors (6555223).

1841938421 is an equidigital number, since it uses as much as digits as its factorization.

1841938421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6555222.

The product of its digits is 55296, while the sum is 41.

The square root of 1841938421 is about 42917.8100676165. The cubic root of 1841938421 is about 1225.8152942204.

The spelling of 1841938421 in words is "one billion, eight hundred forty-one million, nine hundred thirty-eight thousand, four hundred twenty-one".