21374336151473 has 2 divisors, whose sum is σ = 21374336151474. Its totient is φ = 21374336151472.

The previous prime is 21374336151449. The next prime is 21374336151527. The reversal of 21374336151473 is 37415163347312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11549822641009 + 9824513510464 = 3398503^2 + 3134408^2 .

It is a cyclic number.

It is not a de Polignac number, because 21374336151473 - 2¹⁸ = 21374335889329 is a prime.

It is not a weakly prime, because it can be changed into another prime (21374336151433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687168075736 + 10687168075737.

It is an arithmetic number, because the mean of its divisors is an integer number (10687168075737).

Almost surely, 2^{21374336151473} is an apocalyptic number.

It is an amenable number.

21374336151473 is a deficient number, since it is larger than the sum of its proper divisors (1).

21374336151473 is an equidigital number, since it uses as much as digits as its factorization.

21374336151473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 50.

Adding to 21374336151473 its reverse (37415163347312), we get a palindrome (58789499498785).

The spelling of 21374336151473 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred thirty-six million, one hundred fifty-one thousand, four hundred seventy-three".