21829327 has 8 divisors (see below), whose sum is σ = 23544864. Its totient is φ = 20119008.

The previous prime is 21829319. The next prime is 21829331. The reversal of 21829327 is 72392812.

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

It is not a de Polignac number, because 21829327 - 2³ = 21829319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21829292 and 21829301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21829307) 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, 15213 + ... + 16585.

It is an arithmetic number, because the mean of its divisors is an integer number (2943108).

Almost surely, 2^21829327 is an apocalyptic number.

21829327 is a deficient number, since it is larger than the sum of its proper divisors (1715537).

21829327 is a wasteful number, since it uses less digits than its factorization.

21829327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609.

The product of its digits is 12096, while the sum is 34.

The square root of 21829327 is about 4672.1865330913. The cubic root of 21829327 is about 279.4774565446.

The spelling of 21829327 in words is "twenty-one million, eight hundred twenty-nine thousand, three hundred twenty-seven".