16820472 has 32 divisors (see below), whose sum is σ = 44265600. Its totient is φ = 5311584.

The previous prime is 16820437. The next prime is 16820477. The reversal of 16820472 is 27402861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17988 + ... + 18899.

It is an arithmetic number, because the mean of its divisors is an integer number (1383300).

Almost surely, 2^16820472 is an apocalyptic number.

16820472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16820472 is an abundant number, since it is smaller than the sum of its proper divisors (27445128).

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

16820472 is a wasteful number, since it uses less digits than its factorization.

16820472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36915 (or 36911 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 16820472 is about 4101.2768743405. The cubic root of 16820472 is about 256.2198225815.

The spelling of 16820472 in words is "sixteen million, eight hundred twenty thousand, four hundred seventy-two".