20603202643 has 2 divisors, whose sum is σ = 20603202644. Its totient is φ = 20603202642.

The previous prime is 20603202619. The next prime is 20603202667. The reversal of 20603202643 is 34620230602.

It is a balanced prime because it is at equal distance from previous prime (20603202619) and next prime (20603202667).

It is a cyclic number.

It is not a de Polignac number, because 20603202643 - 2³³ = 12013268051 is a prime.

It is not a weakly prime, because it can be changed into another prime (20603202943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301601321 + 10301601322.

It is an arithmetic number, because the mean of its divisors is an integer number (10301601322).

Almost surely, 2^20603202643 is an apocalyptic number.

20603202643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20603202643 is an equidigital number, since it uses as much as digits as its factorization.

20603202643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

The spelling of 20603202643 in words is "twenty billion, six hundred three million, two hundred two thousand, six hundred forty-three".