21980326 has 8 divisors (see below), whose sum is σ = 33003360. Its totient is φ = 10979208.

The previous prime is 21980323. The next prime is 21980339. The reversal of 21980326 is 62308912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21980323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686 + ... + 7153.

It is an arithmetic number, because the mean of its divisors is an integer number (4125420).

Almost surely, 2^21980326 is an apocalyptic number.

21980326 is a deficient number, since it is larger than the sum of its proper divisors (11023034).

21980326 is a wasteful number, since it uses less digits than its factorization.

21980326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21980326 is about 4688.3180352873. The cubic root of 21980326 is about 280.1203819096.

The spelling of 21980326 in words is "twenty-one million, nine hundred eighty thousand, three hundred twenty-six".