16821484 has 6 divisors (see below), whose sum is σ = 29437604. Its totient is φ = 8410740.

The previous prime is 16821481. The next prime is 16821491. The reversal of 16821484 is 48412861.

It is not an unprimeable number, because it can be changed into a prime (16821481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2102682 + ... + 2102689.

Almost surely, 2^16821484 is an apocalyptic number.

It is an amenable number.

16821484 is a deficient number, since it is larger than the sum of its proper divisors (12616120).

16821484 is a wasteful number, since it uses less digits than its factorization.

16821484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205375 (or 4205373 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 16821484 is about 4101.4002486956. The cubic root of 16821484 is about 256.2249609482.

The spelling of 16821484 in words is "sixteen million, eight hundred twenty-one thousand, four hundred eighty-four".