20611451353 has 2 divisors, whose sum is σ = 20611451354. Its totient is φ = 20611451352.

The previous prime is 20611451323. The next prime is 20611451381. The reversal of 20611451353 is 35315411602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20233071049 + 378380304 = 142243^2 + 19452^2 .

It is a cyclic number.

It is not a de Polignac number, because 20611451353 - 2¹⁷ = 20611320281 is a prime.

It is not a weakly prime, because it can be changed into another prime (20611451303) 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, 10305725676 + 10305725677.

It is an arithmetic number, because the mean of its divisors is an integer number (10305725677).

Almost surely, 2^20611451353 is an apocalyptic number.

It is an amenable number.

20611451353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20611451353 is an equidigital number, since it uses as much as digits as its factorization.

20611451353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 20611451353 its reverse (35315411602), we get a palindrome (55926862955).

The spelling of 20611451353 in words is "twenty billion, six hundred eleven million, four hundred fifty-one thousand, three hundred fifty-three".