21082338 has 12 divisors (see below), whose sum is σ = 45678438. Its totient is φ = 7027440.

The previous prime is 21082331. The next prime is 21082351. The reversal of 21082338 is 83328012.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 859329 = 4497^2 + 927^2 .

It is not an unprimeable number, because it can be changed into a prime (21082331) 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, 585603 + ... + 585638.

Almost surely, 2^21082338 is an apocalyptic number.

21082338 is an abundant number, since it is smaller than the sum of its proper divisors (24596100).

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

21082338 is a wasteful number, since it uses less digits than its factorization.

21082338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171249 (or 1171246 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 21082338 is about 4591.5507184393. The cubic root of 21082338 is about 276.2525256555.

The spelling of 21082338 in words is "twenty-one million, eighty-two thousand, three hundred thirty-eight".