21442555342205 has 8 divisors (see below), whose sum is σ = 25734133699800. Its totient is φ = 17151999414336.

The previous prime is 21442555342123. The next prime is 21442555342211. The reversal of 21442555342205 is 50224355524412.

It can be written as a sum of positive squares in 4 ways, for example, as 4731816975076 + 16710738367129 = 2175274^2 + 4087877^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21442555342205 - 2¹⁸ = 21442555080061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255561290 + ... + 255645179.

It is an arithmetic number, because the mean of its divisors is an integer number (3216766712475).

Almost surely, 2^{21442555342205} is an apocalyptic number.

It is an amenable number.

21442555342205 is a deficient number, since it is larger than the sum of its proper divisors (4291578357595).

21442555342205 is an equidigital number, since it uses as much as digits as its factorization.

21442555342205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511214863.

The product of its (nonzero) digits is 1920000, while the sum is 44.

The spelling of 21442555342205 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-five million, three hundred forty-two thousand, two hundred five".