21982335 has 32 divisors (see below), whose sum is σ = 37359360. Its totient is φ = 11006208.

The previous prime is 21982313. The next prime is 21982339. The reversal of 21982335 is 53328912.

It is not a de Polignac number, because 21982335 - 2⁹ = 21981823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21982296 and 21982305.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38764 + ... + 39326.

It is an arithmetic number, because the mean of its divisors is an integer number (1167480).

Almost surely, 2^21982335 is an apocalyptic number.

21982335 is a deficient number, since it is larger than the sum of its proper divisors (15377025).

21982335 is a wasteful number, since it uses less digits than its factorization.

21982335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its digits is 12960, while the sum is 33.

The square root of 21982335 is about 4688.5322863344. The cubic root of 21982335 is about 280.1289159763.

The spelling of 21982335 in words is "twenty-one million, nine hundred eighty-two thousand, three hundred thirty-five".