20114421491 has 2 divisors, whose sum is σ = 20114421492. Its totient is φ = 20114421490.

The previous prime is 20114421419. The next prime is 20114421521. The reversal of 20114421491 is 19412441102.

Together with previous prime (20114421419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20114421491 - 2¹⁰ = 20114420467 is a prime.

It is not a weakly prime, because it can be changed into another prime (20114426491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057210745 + 10057210746.

It is an arithmetic number, because the mean of its divisors is an integer number (10057210746).

Almost surely, 2^20114421491 is an apocalyptic number.

20114421491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20114421491 is an equidigital number, since it uses as much as digits as its factorization.

20114421491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

Adding to 20114421491 its reverse (19412441102), we get a palindrome (39526862593).

The spelling of 20114421491 in words is "twenty billion, one hundred fourteen million, four hundred twenty-one thousand, four hundred ninety-one".