21982334 has 16 divisors (see below), whose sum is σ = 36345456. Its totient is φ = 9888000.

The previous prime is 21982313. The next prime is 21982339. The reversal of 21982334 is 43328912.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21982334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21982339) 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, 3017 + ... + 7284.

It is an arithmetic number, because the mean of its divisors is an integer number (2271591).

Almost surely, 2^21982334 is an apocalyptic number.

21982334 is a deficient number, since it is larger than the sum of its proper divisors (14363122).

21982334 is a wasteful number, since it uses less digits than its factorization.

21982334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10411.

The product of its digits is 10368, while the sum is 32.

The square root of 21982334 is about 4688.5321796912. The cubic root of 21982334 is about 280.1289117285.

The spelling of 21982334 in words is "twenty-one million, nine hundred eighty-two thousand, three hundred thirty-four".