21482918 has 4 divisors (see below), whose sum is σ = 32224380. Its totient is φ = 10741458.

The previous prime is 21482899. The next prime is 21482927. The reversal of 21482918 is 81928412.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5370728 + ... + 5370731.

It is an arithmetic number, because the mean of its divisors is an integer number (8056095).

Almost surely, 2^21482918 is an apocalyptic number.

21482918 is a deficient number, since it is larger than the sum of its proper divisors (10741462).

21482918 is a wasteful number, since it uses less digits than its factorization.

21482918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10741461.

The product of its digits is 9216, while the sum is 35.

The square root of 21482918 is about 4634.9668822981. The cubic root of 21482918 is about 277.9912268853.

The spelling of 21482918 in words is "twenty-one million, four hundred eighty-two thousand, nine hundred eighteen".