20624640503 has 2 divisors, whose sum is σ = 20624640504. Its totient is φ = 20624640502.

The previous prime is 20624640497. The next prime is 20624640511. The reversal of 20624640503 is 30504642602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20624640503 - 2³² = 16329673207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20624640503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20624640563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312320251 + 10312320252.

It is an arithmetic number, because the mean of its divisors is an integer number (10312320252).

Almost surely, 2^20624640503 is an apocalyptic number.

20624640503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20624640503 is an equidigital number, since it uses as much as digits as its factorization.

20624640503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 20624640503 in words is "twenty billion, six hundred twenty-four million, six hundred forty thousand, five hundred three".