1849220421 has 16 divisors (see below), whose sum is σ = 2509081920. Its totient is φ = 1211114240.

The previous prime is 1849220411. The next prime is 1849220423. The reversal of 1849220421 is 1240229481.

It is not a de Polignac number, because 1849220421 - 2⁵ = 1849220389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1849220423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389341 + ... + 394061.

It is an arithmetic number, because the mean of its divisors is an integer number (156817620).

Almost surely, 2^1849220421 is an apocalyptic number.

It is an amenable number.

1849220421 is a deficient number, since it is larger than the sum of its proper divisors (659861499).

1849220421 is a wasteful number, since it uses less digits than its factorization.

1849220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1849220421 is about 43002.5629585028. The cubic root of 1849220421 is about 1227.4285673744.

The spelling of 1849220421 in words is "one billion, eight hundred forty-nine million, two hundred twenty thousand, four hundred twenty-one".