21982014 has 12 divisors (see below), whose sum is σ = 47627736. Its totient is φ = 7327332.

The previous prime is 21982013. The next prime is 21982019. The reversal of 21982014 is 41028912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21982013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 610594 + ... + 610629.

It is an arithmetic number, because the mean of its divisors is an integer number (3968978).

Almost surely, 2^21982014 is an apocalyptic number.

21982014 is an abundant number, since it is smaller than the sum of its proper divisors (25645722).

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

21982014 is a wasteful number, since it uses less digits than its factorization.

21982014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221231 (or 1221228 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 21982014 is about 4688.4980537481. The cubic root of 21982014 is about 280.1275524296.

The spelling of 21982014 in words is "twenty-one million, nine hundred eighty-two thousand, fourteen".