21504223222054 has 8 divisors (see below), whose sum is σ = 32256374259240. Its totient is φ = 10752098468976.

The previous prime is 21504223222021. The next prime is 21504223222063. The reversal of 21504223222054 is 45022232240512.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4379479 + ... + 7885954.

It is an arithmetic number, because the mean of its divisors is an integer number (4032046782405).

Almost surely, 2^{21504223222054} is an apocalyptic number.

21504223222054 is a deficient number, since it is larger than the sum of its proper divisors (10752151037186).

21504223222054 is a wasteful number, since it uses less digits than its factorization.

21504223222054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13142054.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 21504223222054 its reverse (45022232240512), we get a palindrome (66526455462566).

The spelling of 21504223222054 in words is "twenty-one trillion, five hundred four billion, two hundred twenty-three million, two hundred twenty-two thousand, fifty-four".