21674382 has 16 divisors (see below), whose sum is σ = 43500240. Its totient is φ = 7199552.

The previous prime is 21674381. The next prime is 21674399. The reversal of 21674382 is 28347612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4407 + ... + 7922.

It is an arithmetic number, because the mean of its divisors is an integer number (2718765).

Almost surely, 2^21674382 is an apocalyptic number.

21674382 is an abundant number, since it is smaller than the sum of its proper divisors (21825858).

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

21674382 is a wasteful number, since it uses less digits than its factorization.

21674382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12627.

The product of its digits is 16128, while the sum is 33.

The square root of 21674382 is about 4655.5753672344. The cubic root of 21674382 is about 278.8146403076.

The spelling of 21674382 in words is "twenty-one million, six hundred seventy-four thousand, three hundred eighty-two".