16820712 has 24 divisors (see below), whose sum is σ = 45556290. Its totient is φ = 5606880.

The previous prime is 16820707. The next prime is 16820717. The reversal of 16820712 is 21702861.

It is an interprime number because it is at equal distance from previous prime (16820707) and next prime (16820717).

It can be written as a sum of positive squares in only one way, i.e., 16695396 + 125316 = 4086^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (16820717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116739 + ... + 116882.

Almost surely, 2^16820712 is an apocalyptic number.

16820712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16820712 is an abundant number, since it is smaller than the sum of its proper divisors (28735578).

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

16820712 is a wasteful number, since it uses less digits than its factorization.

16820712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233633 (or 233626 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 16820712 is about 4101.3061334165. The cubic root of 16820712 is about 256.2210411852.

The spelling of 16820712 in words is "sixteen million, eight hundred twenty thousand, seven hundred twelve".