21414403 has 8 divisors (see below), whose sum is σ = 22399776. Its totient is φ = 20433600.

The previous prime is 21414401. The next prime is 21414409. The reversal of 21414403 is 30441412.

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 21414403 - 2¹ = 21414401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21414401) 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, 11583 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (2799972).

Almost surely, 2^21414403 is an apocalyptic number.

21414403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21414403 is a deficient number, since it is larger than the sum of its proper divisors (985373).

21414403 is a wasteful number, since it uses less digits than its factorization.

21414403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 21414403 is about 4627.5698806177. The cubic root of 21414403 is about 277.6953817068.

Adding to 21414403 its reverse (30441412), we get a palindrome (51855815).

It can be divided in two parts, 2141440 and 3, that multiplied together give a triangular number (6424320 = T₃₅₈₄).

The spelling of 21414403 in words is "twenty-one million, four hundred fourteen thousand, four hundred three".