21432210410 has 32 divisors (see below), whose sum is σ = 42668376912. Its totient is φ = 7699553280.

The previous prime is 21432210409. The next prime is 21432210433. The reversal of 21432210410 is 1401223412.

It can be written as a sum of positive squares in 8 ways, for example, as 4082315449 + 17349894961 = 63893^2 + 131719^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2223071 + ... + 2232690.

Almost surely, 2^21432210410 is an apocalyptic number.

21432210410 is a deficient number, since it is larger than the sum of its proper divisors (21236166502).

21432210410 is a wasteful number, since it uses less digits than its factorization.

21432210410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455818.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21432210410 its reverse (1401223412), we get a palindrome (22833433822).

The spelling of 21432210410 in words is "twenty-one billion, four hundred thirty-two million, two hundred ten thousand, four hundred ten".