20280984571 has 2 divisors, whose sum is σ = 20280984572. Its totient is φ = 20280984570.

The previous prime is 20280984569. The next prime is 20280984587. The reversal of 20280984571 is 17548908202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20280984571 - 2¹ = 20280984569 is a prime.

It is a super-2 number, since 2×20280984571² (a number of 21 digits) contains 22 as substring.

Together with 20280984569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20280384571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10140492285 + 10140492286.

It is an arithmetic number, because the mean of its divisors is an integer number (10140492286).

Almost surely, 2^20280984571 is an apocalyptic number.

20280984571 is a deficient number, since it is larger than the sum of its proper divisors (1).

20280984571 is an equidigital number, since it uses as much as digits as its factorization.

20280984571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 20280984571 in words is "twenty billion, two hundred eighty million, nine hundred eighty-four thousand, five hundred seventy-one".