20103300643 has 2 divisors, whose sum is σ = 20103300644. Its totient is φ = 20103300642.

The previous prime is 20103300641. The next prime is 20103300667. The reversal of 20103300643 is 34600330102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20103300643 - 2¹ = 20103300641 is a prime.

Together with 20103300641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20103300641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051650321 + 10051650322.

It is an arithmetic number, because the mean of its divisors is an integer number (10051650322).

Almost surely, 2^20103300643 is an apocalyptic number.

20103300643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103300643 is an equidigital number, since it uses as much as digits as its factorization.

20103300643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20103300643 its reverse (34600330102), we get a palindrome (54703630745).

The spelling of 20103300643 in words is "twenty billion, one hundred three million, three hundred thousand, six hundred forty-three".