21455521213414 has 16 divisors (see below), whose sum is σ = 34076515384800. Its totient is φ = 10096686431104.

The previous prime is 21455521213199. The next prime is 21455521213507. The reversal of 21455521213414 is 41431212555412.

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, 14816292 + ... + 16199800.

It is an arithmetic number, because the mean of its divisors is an integer number (2129782211550).

Almost surely, 2^{21455521213414} is an apocalyptic number.

21455521213414 is a deficient number, since it is larger than the sum of its proper divisors (12620994171386).

21455521213414 is a wasteful number, since it uses less digits than its factorization.

21455521213414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839647.

The product of its digits is 192000, while the sum is 40.

Adding to 21455521213414 its reverse (41431212555412), we get a palindrome (62886733768826).

The spelling of 21455521213414 in words is "twenty-one trillion, four hundred fifty-five billion, five hundred twenty-one million, two hundred thirteen thousand, four hundred fourteen".