20736648 has 48 divisors (see below), whose sum is σ = 58247280. Its totient is φ = 6911568.

The previous prime is 20736647. The next prime is 20736659. The reversal of 20736648 is 84663702.

20736648 is a `hidden beast` number, since 2 + 0 + 7 + 3 + 6 + 648 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20736647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3390 + ... + 7277.

It is an arithmetic number, because the mean of its divisors is an integer number (1213485).

Almost surely, 2^20736648 is an apocalyptic number.

It is an amenable number.

20736648 is an abundant number, since it is smaller than the sum of its proper divisors (37510632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20736648 is a wasteful number, since it uses less digits than its factorization.

20736648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10688 (or 10672 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 20736648 is about 4553.7509813340. The cubic root of 20736648 is about 274.7342799686.

The spelling of 20736648 in words is "twenty million, seven hundred thirty-six thousand, six hundred forty-eight".