10203681643 has 2 divisors, whose sum is σ = 10203681644. Its totient is φ = 10203681642.

The previous prime is 10203681617. The next prime is 10203681721. The reversal of 10203681643 is 34618630201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10203681643 - 2⁵ = 10203681611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10203681599 and 10203681608.

It is not a weakly prime, because it can be changed into another prime (10203681743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101840821 + 5101840822.

It is an arithmetic number, because the mean of its divisors is an integer number (5101840822).

Almost surely, 2^10203681643 is an apocalyptic number.

10203681643 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203681643 is an equidigital number, since it uses as much as digits as its factorization.

10203681643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 10203681643 in words is "ten billion, two hundred three million, six hundred eighty-one thousand, six hundred forty-three".