20242020691 has 2 divisors, whose sum is σ = 20242020692. Its totient is φ = 20242020690.

The previous prime is 20242020647. The next prime is 20242020697. The reversal of 20242020691 is 19602024202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20242020691 - 2¹⁵ = 20241987923 is a prime.

It is not a weakly prime, because it can be changed into another prime (20242020697) 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, 10121010345 + 10121010346.

It is an arithmetic number, because the mean of its divisors is an integer number (10121010346).

Almost surely, 2^20242020691 is an apocalyptic number.

20242020691 is a deficient number, since it is larger than the sum of its proper divisors (1).

20242020691 is an equidigital number, since it uses as much as digits as its factorization.

20242020691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 20242020691 its reverse (19602024202), we get a palindrome (39844044893).

The spelling of 20242020691 in words is "twenty billion, two hundred forty-two million, twenty thousand, six hundred ninety-one".