16820173747 has 16 divisors (see below), whose sum is σ = 18402310528. Its totient is φ = 15280151040.

The previous prime is 16820173661. The next prime is 16820173759. The reversal of 16820173747 is 74737102861.

It is a cyclic number.

It is not a de Polignac number, because 16820173747 - 2¹⁵ = 16820140979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16820173697 and 16820173706.

It is not an unprimeable number, because it can be changed into a prime (16820173147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420247 + ... + 458527.

It is an arithmetic number, because the mean of its divisors is an integer number (1150144408).

Almost surely, 2^16820173747 is an apocalyptic number.

16820173747 is a deficient number, since it is larger than the sum of its proper divisors (1582136781).

16820173747 is a wasteful number, since it uses less digits than its factorization.

16820173747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38830.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 16820173747 in words is "sixteen billion, eight hundred twenty million, one hundred seventy-three thousand, seven hundred forty-seven".