20648803 has 8 divisors (see below), whose sum is σ = 23785472. Its totient is φ = 17558856.

The previous prime is 20648791. The next prime is 20648807. The reversal of 20648803 is 30884602.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20648803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20648807) 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, 10725 + ... + 12502.

It is an arithmetic number, because the mean of its divisors is an integer number (2973184).

Almost surely, 2^20648803 is an apocalyptic number.

20648803 is a deficient number, since it is larger than the sum of its proper divisors (3136669).

20648803 is a wasteful number, since it uses less digits than its factorization.

20648803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23361.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20648803 is about 4544.0953995267. The cubic root of 20648803 is about 274.3457859317.

The spelling of 20648803 in words is "twenty million, six hundred forty-eight thousand, eight hundred three".