20648405803 has 2 divisors, whose sum is σ = 20648405804. Its totient is φ = 20648405802.

The previous prime is 20648405783. The next prime is 20648405809. The reversal of 20648405803 is 30850484602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20648405803 is a prime.

It is not a weakly prime, because it can be changed into another prime (20648405809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10324202901 + 10324202902.

It is an arithmetic number, because the mean of its divisors is an integer number (10324202902).

Almost surely, 2^20648405803 is an apocalyptic number.

20648405803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20648405803 is an equidigital number, since it uses as much as digits as its factorization.

20648405803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 20648405803 in words is "twenty billion, six hundred forty-eight million, four hundred five thousand, eight hundred three".