21546330283 has 2 divisors, whose sum is σ = 21546330284. Its totient is φ = 21546330282.

The previous prime is 21546330263. The next prime is 21546330313. The reversal of 21546330283 is 38203364512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21546330283 - 2²¹ = 21544233131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21546330233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10773165141 + 10773165142.

It is an arithmetic number, because the mean of its divisors is an integer number (10773165142).

Almost surely, 2^21546330283 is an apocalyptic number.

21546330283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21546330283 is an equidigital number, since it uses as much as digits as its factorization.

21546330283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 21546330283 its reverse (38203364512), we get a palindrome (59749694795).

The spelling of 21546330283 in words is "twenty-one billion, five hundred forty-six million, three hundred thirty thousand, two hundred eighty-three".