20004356634851 has 2 divisors, whose sum is σ = 20004356634852. Its totient is φ = 20004356634850.

The previous prime is 20004356634793. The next prime is 20004356634907. The reversal of 20004356634851 is 15843665340002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20004356634851 - 2¹⁰ = 20004356633827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20004356634796 and 20004356634805.

It is not a weakly prime, because it can be changed into another prime (20004356630851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002178317425 + 10002178317426.

It is an arithmetic number, because the mean of its divisors is an integer number (10002178317426).

Almost surely, 2^{20004356634851} is an apocalyptic number.

20004356634851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004356634851 is an equidigital number, since it uses as much as digits as its factorization.

20004356634851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 20004356634851 in words is "twenty trillion, four billion, three hundred fifty-six million, six hundred thirty-four thousand, eight hundred fifty-one".