16973891807 has 4 divisors (see below), whose sum is σ = 17521436736. Its totient is φ = 16426346880.

The previous prime is 16973891773. The next prime is 16973891827. The reversal of 16973891807 is 70819837961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16973891807 is a prime.

It is a super-2 number, since 2×16973891807² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16973891827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273772418 + ... + 273772479.

It is an arithmetic number, because the mean of its divisors is an integer number (4380359184).

Almost surely, 2^16973891807 is an apocalyptic number.

16973891807 is a deficient number, since it is larger than the sum of its proper divisors (547544929).

16973891807 is an equidigital number, since it uses as much as digits as its factorization.

16973891807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547544928.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 16973891807 in words is "sixteen billion, nine hundred seventy-three million, eight hundred ninety-one thousand, eight hundred seven".