21179082 has 16 divisors (see below), whose sum is σ = 42419520. Its totient is φ = 7049472.

The previous prime is 21179071. The next prime is 21179089. The reversal of 21179082 is 28097112.

It is not an unprimeable number, because it can be changed into a prime (21179089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2794 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (2651220).

Almost surely, 2^21179082 is an apocalyptic number.

21179082 is an abundant number, since it is smaller than the sum of its proper divisors (21240438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21179082 is a wasteful number, since it uses less digits than its factorization.

21179082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 21179082 is about 4602.0736630350. The cubic root of 21179082 is about 276.6744427743.

The spelling of 21179082 in words is "twenty-one million, one hundred seventy-nine thousand, eighty-two".