16484021 has 4 divisors (see below), whose sum is σ = 16506444. Its totient is φ = 16461600.

The previous prime is 16484003. The next prime is 16484023. The reversal of 16484021 is 12048461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12048461 = 17 ⋅708733.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 14822500 = 1289^2 + 3850^2 .

It is a cyclic number.

It is not a de Polignac number, because 16484021 - 2¹⁰ = 16482997 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 (16484023) 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, 10070 + ... + 11591.

It is an arithmetic number, because the mean of its divisors is an integer number (4126611).

Almost surely, 2^16484021 is an apocalyptic number.

It is an amenable number.

16484021 is a deficient number, since it is larger than the sum of its proper divisors (22423).

16484021 is an equidigital number, since it uses as much as digits as its factorization.

16484021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22422.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 16484021 is about 4060.0518469596. The cubic root of 16484021 is about 254.4999607587.

The spelling of 16484021 in words is "sixteen million, four hundred eighty-four thousand, twenty-one".