21054352027 has 2 divisors, whose sum is σ = 21054352028. Its totient is φ = 21054352026.

The previous prime is 21054352003. The next prime is 21054352043. The reversal of 21054352027 is 72025345012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21054352027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21054352027.

It is not a weakly prime, because it can be changed into another prime (21054352097) 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, 10527176013 + 10527176014.

It is an arithmetic number, because the mean of its divisors is an integer number (10527176014).

Almost surely, 2^21054352027 is an apocalyptic number.

21054352027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21054352027 is an equidigital number, since it uses as much as digits as its factorization.

21054352027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

Adding to 21054352027 its reverse (72025345012), we get a palindrome (93079697039).

The spelling of 21054352027 in words is "twenty-one billion, fifty-four million, three hundred fifty-two thousand, twenty-seven".