21124340410 has 16 divisors (see below), whose sum is σ = 40025066400. Its totient is φ = 8005013136.

The previous prime is 21124340407. The next prime is 21124340411. The reversal of 21124340410 is 1404342112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21124340411) 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, 55590180 + ... + 55590559.

It is an arithmetic number, because the mean of its divisors is an integer number (2501566650).

Almost surely, 2^21124340410 is an apocalyptic number.

21124340410 is a deficient number, since it is larger than the sum of its proper divisors (18900725990).

21124340410 is a wasteful number, since it uses less digits than its factorization.

21124340410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111180765.

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

Adding to 21124340410 its reverse (1404342112), we get a palindrome (22528682522).

The spelling of 21124340410 in words is "twenty-one billion, one hundred twenty-four million, three hundred forty thousand, four hundred ten".