21230467 has 8 divisors (see below), whose sum is σ = 23662800. Its totient is φ = 18929664.

The previous prime is 21230459. The next prime is 21230483. The reversal of 21230467 is 76403212.

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 21230467 - 2³ = 21230459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32542 + ... + 33187.

It is an arithmetic number, because the mean of its divisors is an integer number (2957850).

Almost surely, 2^21230467 is an apocalyptic number.

21230467 is a deficient number, since it is larger than the sum of its proper divisors (2432333).

21230467 is a wasteful number, since it uses less digits than its factorization.

21230467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65765.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21230467 is about 4607.6530902402. The cubic root of 21230467 is about 276.8980192565.

Adding to 21230467 its reverse (76403212), we get a palindrome (97633679).

The spelling of 21230467 in words is "twenty-one million, two hundred thirty thousand, four hundred sixty-seven".