16326820 has 12 divisors (see below), whose sum is σ = 34286364. Its totient is φ = 6530720.

The previous prime is 16326767. The next prime is 16326823. The reversal of 16326820 is 2862361.

It can be written as a sum of positive squares in 2 ways, for example, as 7986276 + 8340544 = 2826^2 + 2888^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (16326823) 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, 408151 + ... + 408190.

It is an arithmetic number, because the mean of its divisors is an integer number (2857197).

Almost surely, 2^16326820 is an apocalyptic number.

16326820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16326820 is an abundant number, since it is smaller than the sum of its proper divisors (17959544).

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

16326820 is a wasteful number, since it uses less digits than its factorization.

16326820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816350 (or 816348 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16326820 is about 4040.6459879579. The cubic root of 16326820 is about 253.6883564984.

It can be divided in two parts, 16 and 326820, that added together give a triangular number (326836 = T₈₀₈).

The spelling of 16326820 in words is "sixteen million, three hundred twenty-six thousand, eight hundred twenty".