18848421 has 12 divisors (see below), whose sum is σ = 27332448. Its totient is φ = 12516264.

The previous prime is 18848413. The next prime is 18848447. The reversal of 18848421 is 12484881.

It is a happy number.

It is not a de Polignac number, because 18848421 - 2³ = 18848413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18848471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1615 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (2277704).

Almost surely, 2^18848421 is an apocalyptic number.

It is an amenable number.

18848421 is a deficient number, since it is larger than the sum of its proper divisors (8484027).

18848421 is a wasteful number, since it uses less digits than its factorization.

18848421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8232 (or 8229 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 18848421 is about 4341.4768224649. The cubic root of 18848421 is about 266.1286665297.

The spelling of 18848421 in words is "eighteen million, eight hundred forty-eight thousand, four hundred twenty-one".