20660240053 has 2 divisors, whose sum is σ = 20660240054. Its totient is φ = 20660240052.

The previous prime is 20660240039. The next prime is 20660240071. The reversal of 20660240053 is 35004206602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20298555729 + 361684324 = 142473^2 + 19018^2 .

It is a cyclic number.

It is not a de Polignac number, because 20660240053 - 2²⁵ = 20626685621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20660244053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10330120026 + 10330120027.

It is an arithmetic number, because the mean of its divisors is an integer number (10330120027).

Almost surely, 2^20660240053 is an apocalyptic number.

It is an amenable number.

20660240053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20660240053 is an equidigital number, since it uses as much as digits as its factorization.

20660240053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20660240053 its reverse (35004206602), we get a palindrome (55664446655).

The spelling of 20660240053 in words is "twenty billion, six hundred sixty million, two hundred forty thousand, fifty-three".