20004305210646 has 16 divisors (see below), whose sum is σ = 40029656530608. Its totient is φ = 6664594052000.

The previous prime is 20004305210633. The next prime is 20004305210647. The reversal of 20004305210646 is 64601250340002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004305210647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876908865 + ... + 876931676.

It is an arithmetic number, because the mean of its divisors is an integer number (2501853533163).

Almost surely, 2^{20004305210646} is an apocalyptic number.

20004305210646 is an abundant number, since it is smaller than the sum of its proper divisors (20025351319962).

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

20004305210646 is a wasteful number, since it uses less digits than its factorization.

20004305210646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753842447.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 20004305210646 its reverse (64601250340002), we get a palindrome (84605555550648).

The spelling of 20004305210646 in words is "twenty trillion, four billion, three hundred five million, two hundred ten thousand, six hundred forty-six".