21024366341969 has 2 divisors, whose sum is σ = 21024366341970. Its totient is φ = 21024366341968.

The previous prime is 21024366341929. The next prime is 21024366342127. The reversal of 21024366341969 is 96914366342012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18633208224400 + 2391158117569 = 4316620^2 + 1546337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21024366341969 is a prime.

It is a super-2 number, since 2×21024366341969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21024366341929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512183170984 + 10512183170985.

It is an arithmetic number, because the mean of its divisors is an integer number (10512183170985).

Almost surely, 2^{21024366341969} is an apocalyptic number.

It is an amenable number.

21024366341969 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024366341969 is an equidigital number, since it uses as much as digits as its factorization.

21024366341969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 21024366341969 in words is "twenty-one trillion, twenty-four billion, three hundred sixty-six million, three hundred forty-one thousand, nine hundred sixty-nine".