21240483 has 8 divisors (see below), whose sum is σ = 30895296. Its totient is φ = 12873000.

The previous prime is 21240433. The next prime is 21240511. The reversal of 21240483 is 38404212.

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

It is not a de Polignac number, because 21240483 - 2¹⁰ = 21239459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21240403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321793 + ... + 321858.

It is an arithmetic number, because the mean of its divisors is an integer number (3861912).

Almost surely, 2^21240483 is an apocalyptic number.

21240483 is a deficient number, since it is larger than the sum of its proper divisors (9654813).

21240483 is a wasteful number, since it uses less digits than its factorization.

21240483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643665.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 21240483 is about 4608.7398494599. The cubic root of 21240483 is about 276.9415569161.

Adding to 21240483 its reverse (38404212), we get a palindrome (59644695).

The spelling of 21240483 in words is "twenty-one million, two hundred forty thousand, four hundred eighty-three".