20020320 has 72 divisors (see below), whose sum is σ = 68324256. Its totient is φ = 5338368.

The previous prime is 20020307. The next prime is 20020331. The reversal of 20020320 is 2302002.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 5512 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (948948).

Almost surely, 2^20020320 is an apocalyptic number.

20020320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020320 is an abundant number, since it is smaller than the sum of its proper divisors (48303936).

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

20020320 is a wasteful number, since it uses less digits than its factorization.

20020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13924 (or 13913 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 20020320 is about 4474.4072233090. The cubic root of 20020320 is about 271.5336588206.

Adding to 20020320 its reverse (2302002), we get a palindrome (22322322).

The spelling of 20020320 in words is "twenty million, twenty thousand, three hundred twenty".