21480027 has 8 divisors (see below), whose sum is σ = 30324816. Its totient is φ = 13477632.

The previous prime is 21480007. The next prime is 21480049. The reversal of 21480027 is 72008412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21480027 - 2⁶ = 21479963 is a prime.

It is a super-2 number, since 2×21480027² = 922783119841458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21479979 and 21480006.

It is not an unprimeable number, because it can be changed into a prime (21480007) 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, 210538 + ... + 210639.

It is an arithmetic number, because the mean of its divisors is an integer number (3790602).

Almost surely, 2^21480027 is an apocalyptic number.

21480027 is a deficient number, since it is larger than the sum of its proper divisors (8844789).

21480027 is a wasteful number, since it uses less digits than its factorization.

21480027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421197.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 21480027 is about 4634.6550033417. The cubic root of 21480027 is about 277.9787563775.

Adding to 21480027 its reverse (72008412), we get a palindrome (93488439).

The spelling of 21480027 in words is "twenty-one million, four hundred eighty thousand, twenty-seven".