21204130413 has 16 divisors (see below), whose sum is σ = 29940333696. Its totient is φ = 13302289920.

The previous prime is 21204130411. The next prime is 21204130469. The reversal of 21204130413 is 31403140212.

It is not a de Polignac number, because 21204130413 - 2¹ = 21204130411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21204130413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204130411) 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 15 ways as a sum of consecutive naturals, for example, 298008 + ... + 362238.

It is an arithmetic number, because the mean of its divisors is an integer number (1871270856).

Almost surely, 2^21204130413 is an apocalyptic number.

It is an amenable number.

21204130413 is a deficient number, since it is larger than the sum of its proper divisors (8736203283).

21204130413 is a wasteful number, since it uses less digits than its factorization.

21204130413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70724.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21204130413 its reverse (31403140212), we get a palindrome (52607270625).

The spelling of 21204130413 in words is "twenty-one billion, two hundred four million, one hundred thirty thousand, four hundred thirteen".