17820958946 has 16 divisors (see below), whose sum is σ = 31878486144. Its totient is φ = 7305486144.

The previous prime is 17820958937. The next prime is 17820958949. The reversal of 17820958946 is 64985902871.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17820958949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27671975 + ... + 27672618.

It is an arithmetic number, because the mean of its divisors is an integer number (1992405384).

Almost surely, 2^17820958946 is an apocalyptic number.

17820958946 is a deficient number, since it is larger than the sum of its proper divisors (14057527198).

17820958946 is a wasteful number, since it uses less digits than its factorization.

17820958946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55344625.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 17820958946 in words is "seventeen billion, eight hundred twenty million, nine hundred fifty-eight thousand, nine hundred forty-six".