20622561733 has 2 divisors, whose sum is σ = 20622561734. Its totient is φ = 20622561732.

The previous prime is 20622561731. The next prime is 20622561779. The reversal of 20622561733 is 33716522602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20282601889 + 339959844 = 142417^2 + 18438^2 .

It is a cyclic number.

It is not a de Polignac number, because 20622561733 - 2¹ = 20622561731 is a prime.

Together with 20622561731, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20622561692 and 20622561701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20622561731) 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, 10311280866 + 10311280867.

It is an arithmetic number, because the mean of its divisors is an integer number (10311280867).

Almost surely, 2^20622561733 is an apocalyptic number.

It is an amenable number.

20622561733 is a deficient number, since it is larger than the sum of its proper divisors (1).

20622561733 is an equidigital number, since it uses as much as digits as its factorization.

20622561733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 20622561733 in words is "twenty billion, six hundred twenty-two million, five hundred sixty-one thousand, seven hundred thirty-three".