21468385 has 8 divisors (see below), whose sum is σ = 27118080. Its totient is φ = 16270704.

The previous prime is 21468383. The next prime is 21468397. The reversal of 21468385 is 58386412.

It is a happy number.

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 21468385 - 2¹ = 21468383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21468383) 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, 112897 + ... + 113086.

It is an arithmetic number, because the mean of its divisors is an integer number (3389760).

Almost surely, 2^21468385 is an apocalyptic number.

It is an amenable number.

21468385 is a deficient number, since it is larger than the sum of its proper divisors (5649695).

21468385 is a wasteful number, since it uses less digits than its factorization.

21468385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226007.

The product of its digits is 46080, while the sum is 37.

The square root of 21468385 is about 4633.3988604479. The cubic root of 21468385 is about 277.9285265597.

The spelling of 21468385 in words is "twenty-one million, four hundred sixty-eight thousand, three hundred eighty-five".