21424222010 has 16 divisors (see below), whose sum is σ = 38945419272. Its totient is φ = 8484840000.

The previous prime is 21424222009. The next prime is 21424222021. The reversal of 21424222010 is 1022242412.

It can be written as a sum of positive squares in 4 ways, for example, as 16012118521 + 5412103489 = 126539^2 + 73567^2 .

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, 10605041 + ... + 10607060.

Almost surely, 2^21424222010 is an apocalyptic number.

21424222010 is a deficient number, since it is larger than the sum of its proper divisors (17521197262).

21424222010 is a wasteful number, since it uses less digits than its factorization.

21424222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21212209.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21424222010 its reverse (1022242412), we get a palindrome (22446464422).

The spelling of 21424222010 in words is "twenty-one billion, four hundred twenty-four million, two hundred twenty-two thousand, ten".