21054082 has 8 divisors (see below), whose sum is σ = 36092736. Its totient is φ = 9023172.

The previous prime is 21054067. The next prime is 21054119. The reversal of 21054082 is 28045012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751918 + ... + 751945.

It is an arithmetic number, because the mean of its divisors is an integer number (4511592).

Almost surely, 2^21054082 is an apocalyptic number.

21054082 is a deficient number, since it is larger than the sum of its proper divisors (15038654).

21054082 is a wasteful number, since it uses less digits than its factorization.

21054082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503872.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 21054082 is about 4588.4727306589. The cubic root of 21054082 is about 276.1290529292.

Adding to 21054082 its reverse (28045012), we get a palindrome (49099094).

The spelling of 21054082 in words is "twenty-one million, fifty-four thousand, eighty-two".