20502030691 has 2 divisors, whose sum is σ = 20502030692. Its totient is φ = 20502030690.

The previous prime is 20502030649. The next prime is 20502030701. The reversal of 20502030691 is 19603020502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20502030691 - 2¹¹ = 20502028643 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502034691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251015345 + 10251015346.

It is an arithmetic number, because the mean of its divisors is an integer number (10251015346).

Almost surely, 2^20502030691 is an apocalyptic number.

20502030691 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502030691 is an equidigital number, since it uses as much as digits as its factorization.

20502030691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 20502030691 in words is "twenty billion, five hundred two million, thirty thousand, six hundred ninety-one".