21082182 has 16 divisors (see below), whose sum is σ = 45997632. Its totient is φ = 6388520.

The previous prime is 21082163. The next prime is 21082183. The reversal of 21082182 is 28128012.

It is a super-2 number, since 2×21082182² = 888916795762248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159648 + ... + 159779.

It is an arithmetic number, because the mean of its divisors is an integer number (2874852).

Almost surely, 2^21082182 is an apocalyptic number.

21082182 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21082182 is an abundant number, since it is smaller than the sum of its proper divisors (24915450).

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

21082182 is a wasteful number, since it uses less digits than its factorization.

21082182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319443.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 21082182 is about 4591.5337306830. The cubic root of 21082182 is about 276.2518442715.

The spelling of 21082182 in words is "twenty-one million, eighty-two thousand, one hundred eighty-two".