21414560 has 48 divisors (see below), whose sum is σ = 53574696. Its totient is φ = 8060928.

The previous prime is 21414551. The next prime is 21414571. The reversal of 21414560 is 6541412.

It can be written as a sum of positive squares in 4 ways, for example, as 14167696 + 7246864 = 3764^2 + 2692^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217 + ... + 6656.

Almost surely, 2^21414560 is an apocalyptic number.

21414560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21414560 is an abundant number, since it is smaller than the sum of its proper divisors (32160136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21414560 is a wasteful number, since it uses less digits than its factorization.

21414560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7905 (or 7897 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21414560 is about 4627.5868441338. The cubic root of 21414560 is about 277.6960603477.

Adding to 21414560 its reverse (6541412), we get a palindrome (27955972).

The spelling of 21414560 in words is "twenty-one million, four hundred fourteen thousand, five hundred sixty".