21342312224 has 24 divisors (see below), whose sum is σ = 42136729740. Its totient is φ = 10640920576.

The previous prime is 21342312197. The next prime is 21342312239. The reversal of 21342312224 is 42221324312.

It can be written as a sum of positive squares in 2 ways, for example, as 21335860624 + 6451600 = 146068^2 + 2540^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21342312193 and 21342312202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933389 + ... + 955980.

Almost surely, 2^21342312224 is an apocalyptic number.

It is an amenable number.

21342312224 is a deficient number, since it is larger than the sum of its proper divisors (20794417516).

21342312224 is a wasteful number, since it uses less digits than its factorization.

21342312224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889732 (or 1889724 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

Adding to 21342312224 its reverse (42221324312), we get a palindrome (63563636536).

The spelling of 21342312224 in words is "twenty-one billion, three hundred forty-two million, three hundred twelve thousand, two hundred twenty-four".