20020399601 has 2 divisors, whose sum is σ = 20020399602. Its totient is φ = 20020399600.

The previous prime is 20020399583. The next prime is 20020399631. The reversal of 20020399601 is 10699302002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10543182400 + 9477217201 = 102680^2 + 97351^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020399601 - 2²⁶ = 19953290737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20020399631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010199800 + 10010199801.

It is an arithmetic number, because the mean of its divisors is an integer number (10010199801).

Almost surely, 2^20020399601 is an apocalyptic number.

It is an amenable number.

20020399601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020399601 is an equidigital number, since it uses as much as digits as its factorization.

20020399601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 20020399601 in words is "twenty billion, twenty million, three hundred ninety-nine thousand, six hundred one".