21411470 has 32 divisors (see below), whose sum is σ = 39890880. Its totient is φ = 8270080.

The previous prime is 21411469. The next prime is 21411473. The reversal of 21411470 is 7411412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411473) 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 15 ways as a sum of consecutive naturals, for example, 37346 + ... + 37914.

It is an arithmetic number, because the mean of its divisors is an integer number (1246590).

Almost surely, 2^21411470 is an apocalyptic number.

21411470 is a deficient number, since it is larger than the sum of its proper divisors (18479410).

21411470 is a wasteful number, since it uses less digits than its factorization.

21411470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 21411470 is about 4627.2529647729. The cubic root of 21411470 is about 277.6827030478.

Adding to 21411470 its reverse (7411412), we get a palindrome (28822882).

The spelling of 21411470 in words is "twenty-one million, four hundred eleven thousand, four hundred seventy".