21628182 has 24 divisors (see below), whose sum is σ = 45954216. Its totient is φ = 6784768.

The previous prime is 21628169. The next prime is 21628193. The reversal of 21628182 is 28182612.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4503 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (1914759).

Almost surely, 2^21628182 is an apocalyptic number.

21628182 is an abundant number, since it is smaller than the sum of its proper divisors (24326034).

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

21628182 is a wasteful number, since it uses less digits than its factorization.

21628182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12512 (or 12495 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 21628182 is about 4650.6109276094. The cubic root of 21628182 is about 278.6163970610.

The spelling of 21628182 in words is "twenty-one million, six hundred twenty-eight thousand, one hundred eighty-two".