20070320 has 80 divisors (see below), whose sum is σ = 49684320. Its totient is φ = 7526400.

The previous prime is 20070307. The next prime is 20070343. The reversal of 20070320 is 2307002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 20070295 and 20070304.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95015 + ... + 95225.

It is an arithmetic number, because the mean of its divisors is an integer number (621054).

Almost surely, 2^20070320 is an apocalyptic number.

20070320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20070320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24842160).

20070320 is an abundant number, since it is smaller than the sum of its proper divisors (29614000).

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

20070320 is a wasteful number, since it uses less digits than its factorization.

20070320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 20070320 is about 4479.9910714197. The cubic root of 20070320 is about 271.7595192827.

Adding to 20070320 its reverse (2307002), we get a palindrome (22377322).

The spelling of 20070320 in words is "twenty million, seventy thousand, three hundred twenty".