21464229 has 8 divisors (see below), whose sum is σ = 28647360. Its totient is φ = 14295296.

The previous prime is 21464227. The next prime is 21464239. The reversal of 21464229 is 92246412.

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 21464229 - 2¹ = 21464227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21464196 and 21464205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (3580920).

Almost surely, 2^21464229 is an apocalyptic number.

It is an amenable number.

21464229 is a deficient number, since it is larger than the sum of its proper divisors (7183131).

21464229 is a wasteful number, since it uses less digits than its factorization.

21464229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7099.

The product of its digits is 6912, while the sum is 30.

The square root of 21464229 is about 4632.9503558748. The cubic root of 21464229 is about 277.9105909534.

The spelling of 21464229 in words is "twenty-one million, four hundred sixty-four thousand, two hundred twenty-nine".