21244224554 has 32 divisors (see below), whose sum is σ = 36561173376. Its totient is φ = 9069096960.

The previous prime is 21244224527. The next prime is 21244224611. The reversal of 21244224554 is 45542244212.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9968069 + ... + 9970199.

It is an arithmetic number, because the mean of its divisors is an integer number (1142536668).

Almost surely, 2^21244224554 is an apocalyptic number.

21244224554 is a deficient number, since it is larger than the sum of its proper divisors (15316948822).

21244224554 is a wasteful number, since it uses less digits than its factorization.

21244224554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590.

The product of its digits is 102400, while the sum is 35.

Adding to 21244224554 its reverse (45542244212), we get a palindrome (66786468766).

The spelling of 21244224554 in words is "twenty-one billion, two hundred forty-four million, two hundred twenty-four thousand, five hundred fifty-four".