21600413 has 4 divisors (see below), whose sum is σ = 21627360. Its totient is φ = 21573468.

The previous prime is 21600391. The next prime is 21600419. The reversal of 21600413 is 31400612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21600413 - 2⁶ = 21600349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21600391 and 21600400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21600419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12233 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (5406840).

Almost surely, 2^21600413 is an apocalyptic number.

It is an amenable number.

21600413 is a deficient number, since it is larger than the sum of its proper divisors (26947).

21600413 is an equidigital number, since it uses as much as digits as its factorization.

21600413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26946.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21600413 is about 4647.6244469621. The cubic root of 21600413 is about 278.4971049834.

The spelling of 21600413 in words is "twenty-one million, six hundred thousand, four hundred thirteen".