21005523404314 has 16 divisors (see below), whose sum is σ = 31536816917760. Its totient is φ = 10493254231200.

The previous prime is 21005523404263. The next prime is 21005523404387. The reversal of 21005523404314 is 41340432550012.

It is a self number, because there is not a number n which added to its sum of digits gives 21005523404314.

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, 12682222 + ... + 14242534.

It is an arithmetic number, because the mean of its divisors is an integer number (1971051057360).

Almost surely, 2^{21005523404314} is an apocalyptic number.

21005523404314 is a deficient number, since it is larger than the sum of its proper divisors (10531293513446).

21005523404314 is a wasteful number, since it uses less digits than its factorization.

21005523404314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566405.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 21005523404314 its reverse (41340432550012), we get a palindrome (62345955954326).

The spelling of 21005523404314 in words is "twenty-one trillion, five billion, five hundred twenty-three million, four hundred four thousand, three hundred fourteen".