20302120 has 32 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 7947328.

The previous prime is 20302099. The next prime is 20302133. The reversal of 20302120 is 2120302.

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 = 20302097 and 20302106.

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 7 ways as a sum of consecutive naturals, for example, 3520 + ... + 7279.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^20302120 is an apocalyptic number.

20302120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20302120 is an abundant number, since it is smaller than the sum of its proper divisors (26353880).

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

20302120 is a wasteful number, since it uses less digits than its factorization.

20302120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857 (or 10853 counting only the distinct ones).

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

The square root of 20302120 is about 4505.7873895691. The cubic root of 20302120 is about 272.8017363001.

Adding to 20302120 its reverse (2120302), we get a palindrome (22422422).

The spelling of 20302120 in words is "twenty million, three hundred two thousand, one hundred twenty".