20784465740629 has 2 divisors, whose sum is σ = 20784465740630. Its totient is φ = 20784465740628.

The previous prime is 20784465740609. The next prime is 20784465740741. The reversal of 20784465740629 is 92604756448702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13477878315729 + 7306587424900 = 3671223^2 + 2703070^2 .

It is a cyclic number.

It is not a de Polignac number, because 20784465740629 - 2⁷ = 20784465740501 is a prime.

It is a super-2 number, since 2×20784465740629² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20784465740609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10392232870314 + 10392232870315.

It is an arithmetic number, because the mean of its divisors is an integer number (10392232870315).

Almost surely, 2^{20784465740629} is an apocalyptic number.

It is an amenable number.

20784465740629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20784465740629 is an equidigital number, since it uses as much as digits as its factorization.

20784465740629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162570240, while the sum is 64.

The spelling of 20784465740629 in words is "twenty trillion, seven hundred eighty-four billion, four hundred sixty-five million, seven hundred forty thousand, six hundred twenty-nine".