20943502507 has 2 divisors, whose sum is σ = 20943502508. Its totient is φ = 20943502506.

The previous prime is 20943502477. The next prime is 20943502519. The reversal of 20943502507 is 70520534902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20943502507 - 2¹⁹ = 20942978219 is a prime.

It is not a weakly prime, because it can be changed into another prime (20943502537) 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, 10471751253 + 10471751254.

It is an arithmetic number, because the mean of its divisors is an integer number (10471751254).

Almost surely, 2^20943502507 is an apocalyptic number.

20943502507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20943502507 is an equidigital number, since it uses as much as digits as its factorization.

20943502507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 20943502507 in words is "twenty billion, nine hundred forty-three million, five hundred two thousand, five hundred seven".