20854482281 has 2 divisors, whose sum is σ = 20854482282. Its totient is φ = 20854482280.

The previous prime is 20854482227. The next prime is 20854482287. The reversal of 20854482281 is 18228445802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10882662400 + 9971819881 = 104320^2 + 99859^2 .

It is a cyclic number.

It is not a de Polignac number, because 20854482281 - 2⁶ = 20854482217 is a prime.

It is a super-2 number, since 2×20854482281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20854482287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10427241140 + 10427241141.

It is an arithmetic number, because the mean of its divisors is an integer number (10427241141).

Almost surely, 2^20854482281 is an apocalyptic number.

It is an amenable number.

20854482281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20854482281 is an equidigital number, since it uses as much as digits as its factorization.

20854482281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 327680, while the sum is 44.

The spelling of 20854482281 in words is "twenty billion, eight hundred fifty-four million, four hundred eighty-two thousand, two hundred eighty-one".