20001853500361 has 2 divisors, whose sum is σ = 20001853500362. Its totient is φ = 20001853500360.

The previous prime is 20001853500341. The next prime is 20001853500379. The reversal of 20001853500361 is 16300535810002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18021765492025 + 1980088008336 = 4245205^2 + 1407156^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001853500361 - 2¹⁵ = 20001853467593 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001853500301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000926750180 + 10000926750181.

It is an arithmetic number, because the mean of its divisors is an integer number (10000926750181).

Almost surely, 2^{20001853500361} is an apocalyptic number.

It is an amenable number.

20001853500361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001853500361 is an equidigital number, since it uses as much as digits as its factorization.

20001853500361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 20001853500361 in words is "twenty trillion, one billion, eight hundred fifty-three million, five hundred thousand, three hundred sixty-one".