17673309481 has 9 divisors (see below), whose sum is σ = 18168932901. Its totient is φ = 17190866592.

The previous prime is 17673309461. The next prime is 17673309527. The reversal of 17673309481 is 18490337671.

The square root of 17673309481 is 132941.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1243197081 + 16430112400 = 35259^2 + 128180^2 .

It is not a de Polignac number, because 17673309481 - 2⁵ = 17673309449 is a prime.

It is a super-2 number, since 2×17673309481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17673309431) 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, 4917021 + ... + 4920613.

Almost surely, 2^17673309481 is an apocalyptic number.

17673309481 is the 132941-st square number.

17673309481 is the 66471-st centered octagonal number.

It is an amenable number.

17673309481 is a deficient number, since it is larger than the sum of its proper divisors (495623420).

17673309481 is an frugal number, since it uses more digits than its factorization.

17673309481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7260 (or 3630 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

Multiplying 17673309481 by its sum of digits (49), we get a square (865992164569 = 930587²).

The spelling of 17673309481 in words is "seventeen billion, six hundred seventy-three million, three hundred nine thousand, four hundred eighty-one".