20825393663 has 2 divisors, whose sum is σ = 20825393664. Its totient is φ = 20825393662.

The previous prime is 20825393653. The next prime is 20825393681. The reversal of 20825393663 is 36639352802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20825393663 - 2¹⁸ = 20825131519 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20825393653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10412696831 + 10412696832.

It is an arithmetic number, because the mean of its divisors is an integer number (10412696832).

Almost surely, 2^20825393663 is an apocalyptic number.

20825393663 is a deficient number, since it is larger than the sum of its proper divisors (1).

20825393663 is an equidigital number, since it uses as much as digits as its factorization.

20825393663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 20825393663 in words is "twenty billion, eight hundred twenty-five million, three hundred ninety-three thousand, six hundred sixty-three".