20985682 has 8 divisors (see below), whose sum is σ = 31757436. Its totient is φ = 10399872.

The previous prime is 20985649. The next prime is 20985703. The reversal of 20985682 is 28658902.

It can be written as a sum of positive squares in 2 ways, for example, as 20985561 + 121 = 4581^2 + 11^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46203 + ... + 46654.

Almost surely, 2^20985682 is an apocalyptic number.

20985682 is a deficient number, since it is larger than the sum of its proper divisors (10771754).

20985682 is a wasteful number, since it uses less digits than its factorization.

20985682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92972.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 20985682 is about 4581.0132067044. The cubic root of 20985682 is about 275.8297013565.

The spelling of 20985682 in words is "twenty million, nine hundred eighty-five thousand, six hundred eighty-two".