21464345 has 8 divisors (see below), whose sum is σ = 29436864. Its totient is φ = 14718384.

The previous prime is 21464323. The next prime is 21464347. The reversal of 21464345 is 54346412.

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 21464345 - 2¹⁸ = 21202201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21464347) 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, 306599 + ... + 306668.

It is an arithmetic number, because the mean of its divisors is an integer number (3679608).

Almost surely, 2^21464345 is an apocalyptic number.

It is an amenable number.

21464345 is a deficient number, since it is larger than the sum of its proper divisors (7972519).

21464345 is an equidigital number, since it uses as much as digits as its factorization.

21464345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613279.

The product of its digits is 11520, while the sum is 29.

The square root of 21464345 is about 4632.9628748782. The cubic root of 21464345 is about 277.9110915937.

The spelling of 21464345 in words is "twenty-one million, four hundred sixty-four thousand, three hundred forty-five".