20668296053 has 2 divisors, whose sum is σ = 20668296054. Its totient is φ = 20668296052.

The previous prime is 20668296001. The next prime is 20668296067. The reversal of 20668296053 is 35069286602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20627566129 + 40729924 = 143623^2 + 6382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20668296053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20668295989 and 20668296007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20668292053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10334148026 + 10334148027.

It is an arithmetic number, because the mean of its divisors is an integer number (10334148027).

Almost surely, 2^20668296053 is an apocalyptic number.

It is an amenable number.

20668296053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20668296053 is an equidigital number, since it uses as much as digits as its factorization.

20668296053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 20668296053 in words is "twenty billion, six hundred sixty-eight million, two hundred ninety-six thousand, fifty-three".