21414318 has 16 divisors (see below), whose sum is σ = 43245696. Its totient is φ = 7068600.

The previous prime is 21414313. The next prime is 21414361. The reversal of 21414318 is 81341412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414313) 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, 16708 + ... + 17943.

It is an arithmetic number, because the mean of its divisors is an integer number (2702856).

Almost surely, 2^21414318 is an apocalyptic number.

21414318 is an abundant number, since it is smaller than the sum of its proper divisors (21831378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21414318 is a wasteful number, since it uses less digits than its factorization.

21414318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34759.

The product of its digits is 768, while the sum is 24.

The square root of 21414318 is about 4627.5606965225. The cubic root of 21414318 is about 277.6950142884.

The spelling of 21414318 in words is "twenty-one million, four hundred fourteen thousand, three hundred eighteen".