16495820 has 48 divisors (see below), whose sum is σ = 38229408. Its totient is φ = 5928960.

The previous prime is 16495783. The next prime is 16495823. The reversal of 16495820 is 2859461.

It is a super-2 number, since 2×16495820² = 544224154944800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16495823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20954 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (796446).

Almost surely, 2^16495820 is an apocalyptic number.

16495820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16495820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19114704).

16495820 is an abundant number, since it is smaller than the sum of its proper divisors (21733588).

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

16495820 is a wasteful number, since it uses less digits than its factorization.

16495820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 16495820 is about 4061.5046472951. The cubic root of 16495820 is about 254.5606686175.

The spelling of 16495820 in words is "sixteen million, four hundred ninety-five thousand, eight hundred twenty".