21403400224130 has 16 divisors (see below), whose sum is σ = 38784684972600. Its totient is φ = 8503901296512.

The previous prime is 21403400224091. The next prime is 21403400224133. The reversal of 21403400224130 is 3142200430412.

It can be written as a sum of positive squares in 4 ways, for example, as 10773302917441 + 10630097306689 = 3282271^2 + 3260383^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21403400224130.

It is not an unprimeable number, because it can be changed into a prime (21403400224133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7182347579 + ... + 7182350558.

Almost surely, 2^{21403400224130} is an apocalyptic number.

21403400224130 is a deficient number, since it is larger than the sum of its proper divisors (17381284748470).

21403400224130 is a wasteful number, since it uses less digits than its factorization.

21403400224130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14364698293.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21403400224130 its reverse (3142200430412), we get a palindrome (24545600654542).

The spelling of 21403400224130 in words is "twenty-one trillion, four hundred three billion, four hundred million, two hundred twenty-four thousand, one hundred thirty".