21374389692289 has 2 divisors, whose sum is σ = 21374389692290. Its totient is φ = 21374389692288.

The previous prime is 21374389692277. The next prime is 21374389692391. The reversal of 21374389692289 is 98229698347312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17410866152689 + 3963523539600 = 4172633^2 + 1990860^2 .

It is a cyclic number.

It is not a de Polignac number, because 21374389692289 - 2¹⁵ = 21374389659521 is a prime.

It is not a weakly prime, because it can be changed into another prime (21374389672289) 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, 10687194846144 + 10687194846145.

It is an arithmetic number, because the mean of its divisors is an integer number (10687194846145).

Almost surely, 2^{21374389692289} is an apocalyptic number.

It is an amenable number.

21374389692289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21374389692289 is an equidigital number, since it uses as much as digits as its factorization.

21374389692289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564350976, while the sum is 73.

The spelling of 21374389692289 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred eighty-nine million, six hundred ninety-two thousand, two hundred eighty-nine".