20320750 has 16 divisors (see below), whose sum is σ = 38040912. Its totient is φ = 8128200.

The previous prime is 20320739. The next prime is 20320757. The reversal of 20320750 is 5702302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320757) 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, 40392 + ... + 40891.

It is an arithmetic number, because the mean of its divisors is an integer number (2377557).

Almost surely, 2^20320750 is an apocalyptic number.

20320750 is a deficient number, since it is larger than the sum of its proper divisors (17720162).

20320750 is an equidigital number, since it uses as much as digits as its factorization.

20320750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81300 (or 81290 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 20320750 is about 4507.8542567390. The cubic root of 20320750 is about 272.8851552168.

The spelling of 20320750 in words is "twenty million, three hundred twenty thousand, seven hundred fifty".