21383182 has 4 divisors (see below), whose sum is σ = 32074776. Its totient is φ = 10691590.

The previous prime is 21383177. The next prime is 21383183. The reversal of 21383182 is 28138312.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21383182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5345794 + ... + 5345797.

It is an arithmetic number, because the mean of its divisors is an integer number (8018694).

Almost surely, 2^21383182 is an apocalyptic number.

21383182 is a deficient number, since it is larger than the sum of its proper divisors (10691594).

21383182 is a wasteful number, since it uses less digits than its factorization.

21383182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10691593.

The product of its digits is 2304, while the sum is 28.

The square root of 21383182 is about 4624.1952813436. The cubic root of 21383182 is about 277.5603612979.

The spelling of 21383182 in words is "twenty-one million, three hundred eighty-three thousand, one hundred eighty-two".