21434420007005 has 4 divisors (see below), whose sum is σ = 25721304008412. Its totient is φ = 17147536005600.

The previous prime is 21434420006999. The next prime is 21434420007061. The reversal of 21434420007005 is 50070002443412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5190473184121 + 16243946822884 = 2278261^2 + 4030378^2 .

It is not a de Polignac number, because 21434420007005 - 2⁸ = 21434420006749 is a prime.

It is a super-2 number, since 2×21434420007005² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143442000696 + ... + 2143442000705.

It is an arithmetic number, because the mean of its divisors is an integer number (6430326002103).

Almost surely, 2^{21434420007005} is an apocalyptic number.

It is an amenable number.

21434420007005 is a deficient number, since it is larger than the sum of its proper divisors (4286884001407).

21434420007005 is an equidigital number, since it uses as much as digits as its factorization.

21434420007005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286884001406.

The product of its (nonzero) digits is 26880, while the sum is 32.

The spelling of 21434420007005 in words is "twenty-one trillion, four hundred thirty-four billion, four hundred twenty million, seven thousand, five".