20168906594 has 8 divisors (see below), whose sum is σ = 30255087708. Its totient is φ = 10083877360.

The previous prime is 20168906567. The next prime is 20168906603. The reversal of 20168906594 is 49560986102.

It can be written as a sum of positive squares in 2 ways, for example, as 20011780369 + 157126225 = 141463^2 + 12535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242777 + ... + 315084.

Almost surely, 2^20168906594 is an apocalyptic number.

20168906594 is a deficient number, since it is larger than the sum of its proper divisors (10086181114).

20168906594 is a wasteful number, since it uses less digits than its factorization.

20168906594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575940.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 20168906594 in words is "twenty billion, one hundred sixty-eight million, nine hundred six thousand, five hundred ninety-four".