21073167503 has 2 divisors, whose sum is σ = 21073167504. Its totient is φ = 21073167502.

The previous prime is 21073167497. The next prime is 21073167589. The reversal of 21073167503 is 30576137012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21073167503 - 2⁶ = 21073167439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21073167103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536583751 + 10536583752.

It is an arithmetic number, because the mean of its divisors is an integer number (10536583752).

Almost surely, 2^21073167503 is an apocalyptic number.

21073167503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073167503 is an equidigital number, since it uses as much as digits as its factorization.

21073167503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 21073167503 in words is "twenty-one billion, seventy-three million, one hundred sixty-seven thousand, five hundred three".