21411430 has 16 divisors (see below), whose sum is σ = 39481344. Its totient is φ = 8355520.

The previous prime is 21411407. The next prime is 21411431. The reversal of 21411430 is 3411412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411431) 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, 25702 + ... + 26521.

It is an arithmetic number, because the mean of its divisors is an integer number (2467584).

Almost surely, 2^21411430 is an apocalyptic number.

21411430 is a deficient number, since it is larger than the sum of its proper divisors (18069914).

21411430 is a wasteful number, since it uses less digits than its factorization.

21411430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52271.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21411430 is about 4627.2486425521. The cubic root of 21411430 is about 277.6825301293.

Adding to 21411430 its reverse (3411412), we get a palindrome (24822842).

The spelling of 21411430 in words is "twenty-one million, four hundred eleven thousand, four hundred thirty".