20326660663 has 2 divisors, whose sum is σ = 20326660664. Its totient is φ = 20326660662.

The previous prime is 20326660649. The next prime is 20326660667. The reversal of 20326660663 is 36606662302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20326660663 - 2²⁹ = 19789789751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20326660667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163330331 + 10163330332.

It is an arithmetic number, because the mean of its divisors is an integer number (10163330332).

Almost surely, 2^20326660663 is an apocalyptic number.

20326660663 is a deficient number, since it is larger than the sum of its proper divisors (1).

20326660663 is an equidigital number, since it uses as much as digits as its factorization.

20326660663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 20326660663 in words is "twenty billion, three hundred twenty-six million, six hundred sixty thousand, six hundred sixty-three".