21468743 has 8 divisors (see below), whose sum is σ = 22162560. Its totient is φ = 20786040.

The previous prime is 21468737. The next prime is 21468751. The reversal of 21468743 is 34786412.

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 21468743 - 2¹² = 21464647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21468793) 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, 1238 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (2770320).

Almost surely, 2^21468743 is an apocalyptic number.

21468743 is a deficient number, since it is larger than the sum of its proper divisors (693817).

21468743 is an equidigital number, since it uses as much as digits as its factorization.

21468743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its digits is 32256, while the sum is 35.

The square root of 21468743 is about 4633.4374928340. The cubic root of 21468743 is about 277.9300714338.

The spelling of 21468743 in words is "twenty-one million, four hundred sixty-eight thousand, seven hundred forty-three".