20204420419973 has 2 divisors, whose sum is σ = 20204420419974. Its totient is φ = 20204420419972.

The previous prime is 20204420419969. The next prime is 20204420420071. The reversal of 20204420419973 is 37991402440202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18593188768324 + 1611231651649 = 4311982^2 + 1269343^2 .

It is a cyclic number.

It is not a de Polignac number, because 20204420419973 - 2² = 20204420419969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20204420412973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102210209986 + 10102210209987.

It is an arithmetic number, because the mean of its divisors is an integer number (10102210209987).

Almost surely, 2^{20204420419973} is an apocalyptic number.

It is an amenable number.

20204420419973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204420419973 is an equidigital number, since it uses as much as digits as its factorization.

20204420419973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 20204420419973 in words is "twenty trillion, two hundred four billion, four hundred twenty million, four hundred nineteen thousand, nine hundred seventy-three".