21034413404803 has 2 divisors, whose sum is σ = 21034413404804. Its totient is φ = 21034413404802.

The previous prime is 21034413404789. The next prime is 21034413404857. The reversal of 21034413404803 is 30840431443012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21034413404803 - 2¹³ = 21034413396611 is a prime.

It is a super-2 number, since 2×21034413404803² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21034413474803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517206702401 + 10517206702402.

It is an arithmetic number, because the mean of its divisors is an integer number (10517206702402).

Almost surely, 2^{21034413404803} is an apocalyptic number.

21034413404803 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034413404803 is an equidigital number, since it uses as much as digits as its factorization.

21034413404803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 37.

Adding to 21034413404803 its reverse (30840431443012), we get a palindrome (51874844847815).

The spelling of 21034413404803 in words is "twenty-one trillion, thirty-four billion, four hundred thirteen million, four hundred four thousand, eight hundred three".