20000220201851 has 2 divisors, whose sum is σ = 20000220201852. Its totient is φ = 20000220201850.

The previous prime is 20000220201839. The next prime is 20000220202033. The reversal of 20000220201851 is 15810202200002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20000220201851 - 2³⁸ = 19725342294907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20000220201751) 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 as a sum of consecutive naturals, namely, 10000110100925 + 10000110100926.

It is an arithmetic number, because the mean of its divisors is an integer number (10000110100926).

Almost surely, 2^{20000220201851} is an apocalyptic number.

20000220201851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000220201851 is an equidigital number, since it uses as much as digits as its factorization.

20000220201851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 20000220201851 its reverse (15810202200002), we get a palindrome (35810422401853).

The spelling of 20000220201851 in words is "twenty trillion, two hundred twenty million, two hundred one thousand, eight hundred fifty-one".