20764446653 has 2 divisors, whose sum is σ = 20764446654. Its totient is φ = 20764446652.

The previous prime is 20764446631. The next prime is 20764446707. The reversal of 20764446653 is 35664446702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19701491044 + 1062955609 = 140362^2 + 32603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20764446653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20764446598 and 20764446607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20764446613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382223326 + 10382223327.

It is an arithmetic number, because the mean of its divisors is an integer number (10382223327).

Almost surely, 2^20764446653 is an apocalyptic number.

It is an amenable number.

20764446653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20764446653 is an equidigital number, since it uses as much as digits as its factorization.

20764446653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 20764446653 in words is "twenty billion, seven hundred sixty-four million, four hundred forty-six thousand, six hundred fifty-three".