21224342330 has 8 divisors (see below), whose sum is σ = 38203816212. Its totient is φ = 8489736928.

The previous prime is 21224342323. The next prime is 21224342389. The reversal of 21224342330 is 3324342212.

It can be written as a sum of positive squares in 2 ways, for example, as 18128198881 + 3096143449 = 134641^2 + 55643^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21224342330.

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, 1061217107 + ... + 1061217126.

Almost surely, 2^21224342330 is an apocalyptic number.

21224342330 is a deficient number, since it is larger than the sum of its proper divisors (16979473882).

21224342330 is a wasteful number, since it uses less digits than its factorization.

21224342330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122434240.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21224342330 its reverse (3324342212), we get a palindrome (24548684542).

The spelling of 21224342330 in words is "twenty-one billion, two hundred twenty-four million, three hundred forty-two thousand, three hundred thirty".