21204224410 has 16 divisors (see below), whose sum is σ = 38276973000. Its totient is φ = 8457385536.

The previous prime is 21204224407. The next prime is 21204224413. The reversal of 21204224410 is 1442240212.

It is an interprime number because it is at equal distance from previous prime (21204224407) and next prime (21204224413).

It can be written as a sum of positive squares in 4 ways, for example, as 20397266761 + 806957649 = 142819^2 + 28407^2 .

It is not an unprimeable number, because it can be changed into a prime (21204224413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3034365 + ... + 3041344.

Almost surely, 2^21204224410 is an apocalyptic number.

21204224410 is a deficient number, since it is larger than the sum of its proper divisors (17072748590).

21204224410 is a wasteful number, since it uses less digits than its factorization.

21204224410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6076065.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21204224410 its reverse (1442240212), we get a palindrome (22646464622).

The spelling of 21204224410 in words is "twenty-one billion, two hundred four million, two hundred twenty-four thousand, four hundred ten".