21031424410 has 16 divisors (see below), whose sum is σ = 37883457000. Its totient is φ = 8406593536.

The previous prime is 21031424377. The next prime is 21031424429. The reversal of 21031424410 is 1442413012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12031676721 + 8999747689 = 109689^2 + 94867^2 .

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, 732235 + ... + 760414.

Almost surely, 2^21031424410 is an apocalyptic number.

21031424410 is a deficient number, since it is larger than the sum of its proper divisors (16852032590).

21031424410 is a wasteful number, since it uses less digits than its factorization.

21031424410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494065.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21031424410 its reverse (1442413012), we get a palindrome (22473837422).

The spelling of 21031424410 in words is "twenty-one billion, thirty-one million, four hundred twenty-four thousand, four hundred ten".