21482641 has 4 divisors (see below), whose sum is σ = 21741552. Its totient is φ = 21223732.

The previous prime is 21482633. The next prime is 21482663. The reversal of 21482641 is 14628412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21482641 - 2³ = 21482633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21482941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129331 + ... + 129496.

It is an arithmetic number, because the mean of its divisors is an integer number (5435388).

Almost surely, 2^21482641 is an apocalyptic number.

It is an amenable number.

21482641 is a deficient number, since it is larger than the sum of its proper divisors (258911).

21482641 is an equidigital number, since it uses as much as digits as its factorization.

21482641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258910.

The product of its digits is 3072, while the sum is 28.

The square root of 21482641 is about 4634.9370006506. The cubic root of 21482641 is about 277.9900320771.

The spelling of 21482641 in words is "twenty-one million, four hundred eighty-two thousand, six hundred forty-one".