20200764381449 has 2 divisors, whose sum is σ = 20200764381450. Its totient is φ = 20200764381448.

The previous prime is 20200764381431. The next prime is 20200764381481. The reversal of 20200764381449 is 94418346700202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15954176855824 + 4246587525625 = 3994268^2 + 2060725^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200764381449 - 2⁴⁴ = 2608578337033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20200764381397 and 20200764381406.

It is not a weakly prime, because it can be changed into another prime (20200764381349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100382190724 + 10100382190725.

It is an arithmetic number, because the mean of its divisors is an integer number (10100382190725).

Almost surely, 2^{20200764381449} is an apocalyptic number.

It is an amenable number.

20200764381449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200764381449 is an equidigital number, since it uses as much as digits as its factorization.

20200764381449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 20200764381449 in words is "twenty trillion, two hundred billion, seven hundred sixty-four million, three hundred eighty-one thousand, four hundred forty-nine".