21082058 has 8 divisors (see below), whose sum is σ = 33287520. Its totient is φ = 9986220.

The previous prime is 21082021. The next prime is 21082063. The reversal of 21082058 is 85028012.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277358 + ... + 277433.

It is an arithmetic number, because the mean of its divisors is an integer number (4160940).

Almost surely, 2^21082058 is an apocalyptic number.

21082058 is a deficient number, since it is larger than the sum of its proper divisors (12205462).

21082058 is a wasteful number, since it uses less digits than its factorization.

21082058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554812.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 21082058 is about 4591.5202275499. The cubic root of 21082058 is about 276.2513026562.

The spelling of 21082058 in words is "twenty-one million, eighty-two thousand, fifty-eight".