20645464274333 has 2 divisors, whose sum is σ = 20645464274334. Its totient is φ = 20645464274332.

The previous prime is 20645464274327. The next prime is 20645464274419. The reversal of 20645464274333 is 33347246454602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15515067132889 + 5130397141444 = 3938917^2 + 2265038^2 .

It is a cyclic number.

It is not a de Polignac number, because 20645464274333 - 2⁴ = 20645464274317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20645464274233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10322732137166 + 10322732137167.

It is an arithmetic number, because the mean of its divisors is an integer number (10322732137167).

Almost surely, 2^{20645464274333} is an apocalyptic number.

It is an amenable number.

20645464274333 is a deficient number, since it is larger than the sum of its proper divisors (1).

20645464274333 is an equidigital number, since it uses as much as digits as its factorization.

20645464274333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 53.

The spelling of 20645464274333 in words is "twenty trillion, six hundred forty-five billion, four hundred sixty-four million, two hundred seventy-four thousand, three hundred thirty-three".