21480414 has 8 divisors (see below), whose sum is σ = 42960840. Its totient is φ = 7160136.

The previous prime is 21480397. The next prime is 21480439. The reversal of 21480414 is 41408412.

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

21480414 is an admirable number.

It is a super-2 number, since 2×21480414² = 922816371222792, which contains 22 as substring.

It is a Curzon number.

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, 1790029 + ... + 1790040.

It is an arithmetic number, because the mean of its divisors is an integer number (5370105).

Almost surely, 2^21480414 is an apocalyptic number.

21480414 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.

21480414 is a wasteful number, since it uses less digits than its factorization.

21480414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580074.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 21480414 is about 4634.6967538341. The cubic root of 21480414 is about 277.9804257909.

Adding to 21480414 its reverse (41408412), we get a palindrome (62888826).

The spelling of 21480414 in words is "twenty-one million, four hundred eighty thousand, four hundred fourteen".