20320350 has 24 divisors (see below), whose sum is σ = 50394840. Its totient is φ = 5418720.

The previous prime is 20320343. The next prime is 20320361. The reversal of 20320350 is 5302302.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 in 11 ways as a sum of consecutive naturals, for example, 67585 + ... + 67884.

It is an arithmetic number, because the mean of its divisors is an integer number (2099785).

Almost surely, 2^20320350 is an apocalyptic number.

20320350 is an abundant number, since it is smaller than the sum of its proper divisors (30074490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20320350 is a wasteful number, since it uses less digits than its factorization.

20320350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135484 (or 135479 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 20320350 is about 4507.8098895140. The cubic root of 20320350 is about 272.8833646861.

Adding to 20320350 its reverse (5302302), we get a palindrome (25622652).

The spelling of 20320350 in words is "twenty million, three hundred twenty thousand, three hundred fifty".