20366423401 has 2 divisors, whose sum is σ = 20366423402. Its totient is φ = 20366423400.

The previous prime is 20366423393. The next prime is 20366423417. The reversal of 20366423401 is 10432466302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15826898025 + 4539525376 = 125805^2 + 67376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20366423401 - 2³ = 20366423393 is a prime.

It is not a weakly prime, because it can be changed into another prime (20366424401) 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, 10183211700 + 10183211701.

It is an arithmetic number, because the mean of its divisors is an integer number (10183211701).

Almost surely, 2^20366423401 is an apocalyptic number.

It is an amenable number.

20366423401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20366423401 is an equidigital number, since it uses as much as digits as its factorization.

20366423401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 20366423401 its reverse (10432466302), we get a palindrome (30798889703).

The spelling of 20366423401 in words is "twenty billion, three hundred sixty-six million, four hundred twenty-three thousand, four hundred one".