21470414 has 32 divisors (see below), whose sum is σ = 38664192. Its totient is φ = 8748000.

The previous prime is 21470389. The next prime is 21470417. The reversal of 21470414 is 41407412.

It is a happy number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 21470414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26069 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (1208256).

Almost surely, 2^21470414 is an apocalyptic number.

21470414 is a deficient number, since it is larger than the sum of its proper divisors (17193778).

21470414 is a wasteful number, since it uses less digits than its factorization.

21470414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 21470414 is about 4633.6178090127. The cubic root of 21470414 is about 277.9372820578.

Adding to 21470414 its reverse (41407412), we get a palindrome (62877826).

The spelling of 21470414 in words is "twenty-one million, four hundred seventy thousand, four hundred fourteen".