21004401413 has 8 divisors (see below), whose sum is σ = 21156228000. Its totient is φ = 20852719888.

The previous prime is 21004401373. The next prime is 21004401427. The reversal of 21004401413 is 31410440012.

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 21004401413 - 2⁸ = 21004401157 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 (21004404413) 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, 263258 + ... + 333636.

It is an arithmetic number, because the mean of its divisors is an integer number (2644528500).

Almost surely, 2^21004401413 is an apocalyptic number.

It is an amenable number.

21004401413 is a deficient number, since it is larger than the sum of its proper divisors (151826587).

21004401413 is a wasteful number, since it uses less digits than its factorization.

21004401413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72531.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21004401413 its reverse (31410440012), we get a palindrome (52414841425).

The spelling of 21004401413 in words is "twenty-one billion, four million, four hundred one thousand, four hundred thirteen".