21173460410 has 16 divisors (see below), whose sum is σ = 38242309896. Its totient is φ = 8440477248.

The previous prime is 21173460401. The next prime is 21173460421. The reversal of 21173460410 is 1406437112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19798459849 + 1375000561 = 140707^2 + 37081^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3610289 + ... + 3616148.

Almost surely, 2^21173460410 is an apocalyptic number.

21173460410 is a deficient number, since it is larger than the sum of its proper divisors (17068849486).

21173460410 is a wasteful number, since it uses less digits than its factorization.

21173460410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7226737.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21173460410 its reverse (1406437112), we get a palindrome (22579897522).

The spelling of 21173460410 in words is "twenty-one billion, one hundred seventy-three million, four hundred sixty thousand, four hundred ten".