21404024125213 has 8 divisors (see below), whose sum is σ = 21596185977408. Its totient is φ = 21211910443584.

The previous prime is 21404024125201. The next prime is 21404024125249. The reversal of 21404024125213 is 31252142040412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21404024125213 - 2³³ = 21395434190621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404024125273) 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, 11149681 + ... + 12927622.

It is an arithmetic number, because the mean of its divisors is an integer number (2699523247176).

Almost surely, 2^{21404024125213} is an apocalyptic number.

It is an amenable number.

21404024125213 is a deficient number, since it is larger than the sum of its proper divisors (192161852195).

21404024125213 is a wasteful number, since it uses less digits than its factorization.

21404024125213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24085283.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 21404024125213 its reverse (31252142040412), we get a palindrome (52656166165625).

The spelling of 21404024125213 in words is "twenty-one trillion, four hundred four billion, twenty-four million, one hundred twenty-five thousand, two hundred thirteen".