21210414 has 8 divisors (see below), whose sum is σ = 42420840. Its totient is φ = 7070136.

The previous prime is 21210389. The next prime is 21210433. The reversal of 21210414 is 41401212.

It is a sphenic number, since it is the product of 3 distinct primes.

21210414 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21210393 and 21210402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767529 + ... + 1767540.

It is an arithmetic number, because the mean of its divisors is an integer number (5302605).

Almost surely, 2^21210414 is an apocalyptic number.

21210414 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21210414 is a wasteful number, since it uses less digits than its factorization.

21210414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535074.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21210414 is about 4605.4765225761. The cubic root of 21210414 is about 276.8108114853.

Adding to 21210414 its reverse (41401212), we get a palindrome (62611626).

The spelling of 21210414 in words is "twenty-one million, two hundred ten thousand, four hundred fourteen".