20655982 has 8 divisors (see below), whose sum is σ = 31983552. Its totient is φ = 9994800.

The previous prime is 20655967. The next prime is 20655989. The reversal of 20655982 is 28955602.

It is a happy number.

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 (20655989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166519 + ... + 166642.

It is an arithmetic number, because the mean of its divisors is an integer number (3997944).

Almost surely, 2^20655982 is an apocalyptic number.

20655982 is a deficient number, since it is larger than the sum of its proper divisors (11327570).

20655982 is a wasteful number, since it uses less digits than its factorization.

20655982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333194.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 20655982 is about 4544.8852570775. The cubic root of 20655982 is about 274.3775763167.

The spelling of 20655982 in words is "twenty million, six hundred fifty-five thousand, nine hundred eighty-two".