20648678 has 8 divisors (see below), whose sum is σ = 31055880. Its totient is φ = 10296720.

The previous prime is 20648647. The next prime is 20648699. The reversal of 20648678 is 87684602.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12863 + ... + 14378.

It is an arithmetic number, because the mean of its divisors is an integer number (3881985).

Almost surely, 2^20648678 is an apocalyptic number.

20648678 is a deficient number, since it is larger than the sum of its proper divisors (10407202).

20648678 is a wasteful number, since it uses less digits than its factorization.

20648678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27622.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 20648678 is about 4544.0816453933. The cubic root of 20648678 is about 274.3452323356.

Adding to 20648678 its product of nonzero digits (129024), we get a palindrome (20777702).

It can be divided in two parts, 206 and 48678, that added together give a palindrome (48884).

The spelling of 20648678 in words is "twenty million, six hundred forty-eight thousand, six hundred seventy-eight".