20314443491 has 2 divisors, whose sum is σ = 20314443492. Its totient is φ = 20314443490.

The previous prime is 20314443449. The next prime is 20314443497. The reversal of 20314443491 is 19434441302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20314443491 is a prime.

It is a super-2 number, since 2×20314443491² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20314443497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157221745 + 10157221746.

It is an arithmetic number, because the mean of its divisors is an integer number (10157221746).

Almost surely, 2^20314443491 is an apocalyptic number.

20314443491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20314443491 is an equidigital number, since it uses as much as digits as its factorization.

20314443491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 20314443491 its reverse (19434441302), we get a palindrome (39748884793).

The spelling of 20314443491 in words is "twenty billion, three hundred fourteen million, four hundred forty-three thousand, four hundred ninety-one".