21048104663 has 2 divisors, whose sum is σ = 21048104664. Its totient is φ = 21048104662.

The previous prime is 21048104659. The next prime is 21048104729. The reversal of 21048104663 is 36640184012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21048104663 - 2² = 21048104659 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 (21048154663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10524052331 + 10524052332.

It is an arithmetic number, because the mean of its divisors is an integer number (10524052332).

Almost surely, 2^21048104663 is an apocalyptic number.

21048104663 is a deficient number, since it is larger than the sum of its proper divisors (1).

21048104663 is an equidigital number, since it uses as much as digits as its factorization.

21048104663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 21048104663 its reverse (36640184012), we get a palindrome (57688288675).

The spelling of 21048104663 in words is "twenty-one billion, forty-eight million, one hundred four thousand, six hundred sixty-three".