21941382 has 16 divisors (see below), whose sum is σ = 44412480. Its totient is φ = 7225512.

The previous prime is 21941351. The next prime is 21941389. The reversal of 21941382 is 28314912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21941389) 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, 21532 + ... + 22527.

It is an arithmetic number, because the mean of its divisors is an integer number (2775780).

Almost surely, 2^21941382 is an apocalyptic number.

21941382 is an abundant number, since it is smaller than the sum of its proper divisors (22471098).

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

21941382 is a wasteful number, since it uses less digits than its factorization.

21941382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44147.

The product of its digits is 3456, while the sum is 30.

The square root of 21941382 is about 4684.1628921292. The cubic root of 21941382 is about 279.9548481615.

The spelling of 21941382 in words is "twenty-one million, nine hundred forty-one thousand, three hundred eighty-two".