20168164846404 has 81 divisors (see below), whose sum is σ = 51125103339037. Its totient is φ = 6703725116928.

The previous prime is 20168164846387. The next prime is 20168164846451. The reversal of 20168164846404 is 40464846186102.

The square root of 20168164846404 is 4490898.

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

20168164846404 is a `hidden beast` number, since 2 + 0 + 16 + 8 + 164 + 8 + 464 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12325028532804 + 7843136313600 = 3510702^2 + 2800560^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12098478379 + ... + 12098480045.

Almost surely, 2^{20168164846404} is an apocalyptic number.

20168164846404 is the 4490898-th square number.

It is an amenable number.

20168164846404 is an abundant number, since it is smaller than the sum of its proper divisors (30956938492633).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20168164846404 is an frugal number, since it uses more digits than its factorization.

20168164846404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 2121 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 54.

The spelling of 20168164846404 in words is "twenty trillion, one hundred sixty-eight billion, one hundred sixty-four million, eight hundred forty-six thousand, four hundred four".