20888648 has 32 divisors (see below), whose sum is σ = 45243360. Its totient is φ = 8935680.

The previous prime is 20888641. The next prime is 20888653. The reversal of 20888648 is 84688802.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 20888599 and 20888608.

It is not an unprimeable number, because it can be changed into a prime (20888641) 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 7 ways as a sum of consecutive naturals, for example, 5486 + ... + 8477.

It is an arithmetic number, because the mean of its divisors is an integer number (1413855).

Almost surely, 2^20888648 is an apocalyptic number.

It is an amenable number.

20888648 is an abundant number, since it is smaller than the sum of its proper divisors (24354712).

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

20888648 is a wasteful number, since it uses less digits than its factorization.

20888648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13997 (or 13993 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The square root of 20888648 is about 4570.4100472496. The cubic root of 20888648 is about 275.4039155359.

The spelling of 20888648 in words is "twenty million, eight hundred eighty-eight thousand, six hundred forty-eight".