21123482 has 8 divisors (see below), whose sum is σ = 31916916. Its totient is φ = 10484512.

The previous prime is 21123467. The next prime is 21123491. The reversal of 21123482 is 28432112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20894041 + 229441 = 4571^2 + 479^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38273 + ... + 38820.

Almost surely, 2^21123482 is an apocalyptic number.

21123482 is a deficient number, since it is larger than the sum of its proper divisors (10793434).

21123482 is a wasteful number, since it uses less digits than its factorization.

21123482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77232.

The product of its digits is 768, while the sum is 23.

The square root of 21123482 is about 4596.0289381160. The cubic root of 21123482 is about 276.4321190814.

Adding to 21123482 its reverse (28432112), we get a palindrome (49555594).

The spelling of 21123482 in words is "twenty-one million, one hundred twenty-three thousand, four hundred eighty-two".