20650414391 has 2 divisors, whose sum is σ = 20650414392. Its totient is φ = 20650414390.

The previous prime is 20650414289. The next prime is 20650414409. The reversal of 20650414391 is 19341405602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20650414391 - 2¹⁸ = 20650152247 is a prime.

It is a super-2 number, since 2×20650414391² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20650414891) 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, 10325207195 + 10325207196.

It is an arithmetic number, because the mean of its divisors is an integer number (10325207196).

Almost surely, 2^20650414391 is an apocalyptic number.

20650414391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20650414391 is an equidigital number, since it uses as much as digits as its factorization.

20650414391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 20650414391 its reverse (19341405602), we get a palindrome (39991819993).

The spelling of 20650414391 in words is "twenty billion, six hundred fifty million, four hundred fourteen thousand, three hundred ninety-one".