21043401413 has 8 divisors (see below), whose sum is σ = 21561059520. Its totient is φ = 20525953120.

The previous prime is 21043401343. The next prime is 21043401427. The reversal of 21043401413 is 31410434012.

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 21043401413 - 2²⁴ = 21026624197 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 (21043401013) 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, 161168 + ... + 260886.

It is an arithmetic number, because the mean of its divisors is an integer number (2695132440).

Almost surely, 2^21043401413 is an apocalyptic number.

It is an amenable number.

21043401413 is a deficient number, since it is larger than the sum of its proper divisors (517658107).

21043401413 is an equidigital number, since it uses as much as digits as its factorization.

21043401413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104907.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21043401413 its reverse (31410434012), we get a palindrome (52453835425).

The spelling of 21043401413 in words is "twenty-one billion, forty-three million, four hundred one thousand, four hundred thirteen".