20680448 has 18 divisors (see below), whose sum is σ = 41280624. Its totient is φ = 10340096.

The previous prime is 20680433. The next prime is 20680453. The reversal of 20680448 is 84408602.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

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, 40136 + ... + 40647.

It is an arithmetic number, because the mean of its divisors is an integer number (2293368).

Almost surely, 2^20680448 is an apocalyptic number.

It is an amenable number.

20680448 is a deficient number, since it is larger than the sum of its proper divisors (20600176).

20680448 is an frugal number, since it uses more digits than its factorization.

20680448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80799 (or 80785 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 20680448 is about 4547.5760576377. The cubic root of 20680448 is about 274.4858625128.

The spelling of 20680448 in words is "twenty million, six hundred eighty thousand, four hundred forty-eight".