20320120 has 32 divisors (see below), whose sum is σ = 48128400. Its totient is φ = 7699968.

The previous prime is 20320103. The next prime is 20320171. The reversal of 20320120 is 2102302.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20320097 and 20320106.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12609 + ... + 14128.

Almost surely, 2^20320120 is an apocalyptic number.

20320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320120 is an abundant number, since it is smaller than the sum of its proper divisors (27808280).

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

20320120 is a wasteful number, since it uses less digits than its factorization.

20320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26767 (or 26763 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20320120 is about 4507.7843781618. The cubic root of 20320120 is about 272.8823351204.

Adding to 20320120 its reverse (2102302), we get a palindrome (22422422).

The spelling of 20320120 in words is "twenty million, three hundred twenty thousand, one hundred twenty".