21432015041377 has 2 divisors, whose sum is σ = 21432015041378. Its totient is φ = 21432015041376.

The previous prime is 21432015041279. The next prime is 21432015041401. The reversal of 21432015041377 is 77314051023412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17198280820561 + 4233734220816 = 4147081^2 + 2057604^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432015041377 - 2¹⁵ = 21432015008609 is a prime.

It is a super-3 number, since 3×21432015041377³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (21432015045377) 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, 10716007520688 + 10716007520689.

It is an arithmetic number, because the mean of its divisors is an integer number (10716007520689).

Almost surely, 2^{21432015041377} is an apocalyptic number.

It is an amenable number.

21432015041377 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432015041377 is an equidigital number, since it uses as much as digits as its factorization.

21432015041377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

Adding to 21432015041377 its reverse (77314051023412), we get a palindrome (98746066064789).

The spelling of 21432015041377 in words is "twenty-one trillion, four hundred thirty-two billion, fifteen million, forty-one thousand, three hundred seventy-seven".