20321066256453 has 12 divisors (see below), whose sum is σ = 29354985258508. Its totient is φ = 13546300273920.

The previous prime is 20321066256451. The next prime is 20321066256457. The reversal of 20321066256453 is 35465266012302.

20321066256453 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 10 + 6 + 625 + 6 + 4 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16639399456164 + 3681666800289 = 4079142^2 + 1918767^2 .

It is not a de Polignac number, because 20321066256453 - 2¹ = 20321066256451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321066256399 and 20321066256408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321066256451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89649718 + ... + 89876103.

Almost surely, 2^{20321066256453} is an apocalyptic number.

It is an amenable number.

20321066256453 is a deficient number, since it is larger than the sum of its proper divisors (9033919002055).

20321066256453 is a wasteful number, since it uses less digits than its factorization.

20321066256453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179538404 (or 179538401 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 20321066256453 in words is "twenty trillion, three hundred twenty-one billion, sixty-six million, two hundred fifty-six thousand, four hundred fifty-three".