20648956 has 12 divisors (see below), whose sum is σ = 36176392. Its totient is φ = 10312848.

The previous prime is 20648951. The next prime is 20648977. The reversal of 20648956 is 65984602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20648951) 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, 2011 + ... + 6733.

Almost surely, 2^20648956 is an apocalyptic number.

It is an amenable number.

20648956 is a deficient number, since it is larger than the sum of its proper divisors (15527436).

20648956 is a wasteful number, since it uses less digits than its factorization.

20648956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5820 (or 5818 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 20648956 is about 4544.1122345294. The cubic root of 20648956 is about 274.3464635304.

The spelling of 20648956 in words is "twenty million, six hundred forty-eight thousand, nine hundred fifty-six".