21414410 has 16 divisors (see below), whose sum is σ = 38779776. Its totient is φ = 8513808.

The previous prime is 21414409. The next prime is 21414413. The reversal of 21414410 is 1441412.

It is not an unprimeable number, because it can be changed into a prime (21414413) 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, 4742 + ... + 8081.

It is an arithmetic number, because the mean of its divisors is an integer number (2423736).

Almost surely, 2^21414410 is an apocalyptic number.

21414410 is a deficient number, since it is larger than the sum of its proper divisors (17365366).

21414410 is a wasteful number, since it uses less digits than its factorization.

21414410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12997.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 21414410 is about 4627.5706369541. The cubic root of 21414410 is about 277.6954119647.

Adding to 21414410 its reverse (1441412), we get a palindrome (22855822).

The spelling of 21414410 in words is "twenty-one million, four hundred fourteen thousand, four hundred ten".