17947448973 has 6 divisors (see below), whose sum is σ = 25924092974. Its totient is φ = 11964965976.

The previous prime is 17947448957. The next prime is 17947448983. The reversal of 17947448973 is 37984474971.

17947448973 is a `hidden beast` number, since 1 + 79 + 474 + 4 + 8 + 97 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16709957289 + 1237491684 = 129267^2 + 35178^2 .

It is not a de Polignac number, because 17947448973 - 2⁴ = 17947448957 is a prime.

It is a super-2 number, since 2×17947448973² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17947448973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17947448983) 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, 997080490 + ... + 997080507.

Almost surely, 2^17947448973 is an apocalyptic number.

It is an amenable number.

17947448973 is a deficient number, since it is larger than the sum of its proper divisors (7976644001).

17947448973 is a wasteful number, since it uses less digits than its factorization.

17947448973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994161003 (or 1994161000 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The spelling of 17947448973 in words is "seventeen billion, nine hundred forty-seven million, four hundred forty-eight thousand, nine hundred seventy-three".