21472414 has 16 divisors (see below), whose sum is σ = 32656320. Its totient is φ = 10588320.

The previous prime is 21472403. The next prime is 21472417. The reversal of 21472414 is 41427412.

It is a super-3 number, since 3×21472414³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79099 + ... + 79369.

It is an arithmetic number, because the mean of its divisors is an integer number (2041020).

Almost surely, 2^21472414 is an apocalyptic number.

21472414 is a deficient number, since it is larger than the sum of its proper divisors (11183906).

21472414 is a wasteful number, since it uses less digits than its factorization.

21472414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675.

The product of its digits is 1792, while the sum is 25.

The square root of 21472414 is about 4633.8336180748. The cubic root of 21472414 is about 277.9459118760.

Adding to 21472414 its reverse (41427412), we get a palindrome (62899826).

The spelling of 21472414 in words is "twenty-one million, four hundred seventy-two thousand, four hundred fourteen".