21482617 has 4 divisors (see below), whose sum is σ = 23135140. Its totient is φ = 19830096.

The previous prime is 21482603. The next prime is 21482623. The reversal of 21482617 is 71628412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4541161 + 16941456 = 2131^2 + 4116^2 .

It is not a de Polignac number, because 21482617 - 2²³ = 13094009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21482677) 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, 826242 + ... + 826267.

It is an arithmetic number, because the mean of its divisors is an integer number (5783785).

Almost surely, 2^21482617 is an apocalyptic number.

It is an amenable number.

21482617 is a deficient number, since it is larger than the sum of its proper divisors (1652523).

21482617 is a wasteful number, since it uses less digits than its factorization.

21482617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652522.

The product of its digits is 5376, while the sum is 31.

The square root of 21482617 is about 4634.9344116179. The cubic root of 21482617 is about 277.9899285553.

The spelling of 21482617 in words is "twenty-one million, four hundred eighty-two thousand, six hundred seventeen".