16720300249 has 9 divisors (see below), whose sum is σ = 16833163711. Its totient is φ = 16608191080.

The previous prime is 16720300231. The next prime is 16720300279. The reversal of 16720300249 is 94200302761.

The square root of 16720300249 is 129307.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16621655625 + 98644624 = 128925^2 + 9932^2 .

It is not a de Polignac number, because 16720300249 - 2⁵ = 16720300217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16720300279) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24697299 + ... + 24697975.

Almost surely, 2^16720300249 is an apocalyptic number.

16720300249 is the 129307-th square number.

16720300249 is the 64654-th centered octagonal number.

It is an amenable number.

16720300249 is a deficient number, since it is larger than the sum of its proper divisors (112863462).

16720300249 is an frugal number, since it uses more digits than its factorization.

16720300249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

It can be divided in two parts, 16720 and 300249, that added together give a square (316969 = 563²).

The spelling of 16720300249 in words is "sixteen billion, seven hundred twenty million, three hundred thousand, two hundred forty-nine".