16281820 has 24 divisors (see below), whose sum is σ = 35296128. Its totient is φ = 6302400.

The previous prime is 16281809. The next prime is 16281827. The reversal of 16281820 is 2818261.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16281827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12511 + ... + 13750.

It is an arithmetic number, because the mean of its divisors is an integer number (1470672).

Almost surely, 2^16281820 is an apocalyptic number.

16281820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16281820 is an abundant number, since it is smaller than the sum of its proper divisors (19014308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16281820 is a wasteful number, since it uses less digits than its factorization.

16281820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26301 (or 26299 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 16281820 is about 4035.0737291901. The cubic root of 16281820 is about 253.4550699924.

The spelling of 16281820 in words is "sixteen million, two hundred eighty-one thousand, eight hundred twenty".