20388448 has 12 divisors (see below), whose sum is σ = 40139820. Its totient is φ = 10194208.

The previous prime is 20388437. The next prime is 20388449. The reversal of 20388448 is 84488302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20388449) 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 as a sum of consecutive naturals, namely, 318538 + ... + 318601.

It is an arithmetic number, because the mean of its divisors is an integer number (3344985).

Almost surely, 2^20388448 is an apocalyptic number.

It is an amenable number.

20388448 is a deficient number, since it is larger than the sum of its proper divisors (19751372).

20388448 is an equidigital number, since it uses as much as digits as its factorization.

20388448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637149 (or 637141 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 20388448 is about 4515.3569072666. The cubic root of 20388448 is about 273.1878556940.

The spelling of 20388448 in words is "twenty million, three hundred eighty-eight thousand, four hundred forty-eight".